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Nassau & Suffolk County · Long Island, NY

Stop Driving to Showrooms
and Guessing on Amazon.

John Mavros sources, delivers, and installs commercial gym equipment — new or pre-owned, one piece or an entire facility — anywhere in Nassau or Suffolk County. He brings the gear, the 3D layout, and the install crew. You just show up and lift.

Commercial-Grade Brands New & Pre-Owned Available Free In-Home 3D Layout Delivery & Installation Included Nassau & Suffolk County

One call covers:

New Equipment via Gym Tech Fitness
Pre-Owned via PreOwnedGym.com
Delivery & Install via FitMovers123
Service & Repair via Gym Tech Fitness

The Real Stuff

The Brands You See in
Real Commercial Gyms.

Not the consumer versions with half the frame weight. The actual commercial-grade equipment — the machines that run 8 hours a day in hotel gyms and fitness centers. John sources all of it, new through Gym Tech Fitness or pre-owned through PreOwnedGym.com.

😏 Yes, your boy John has access to the good stuff. TechnoGym. Life Fitness. Precor. Cybex. The brands that cost $15,000 new and last 25 years — available through his supplier network. New, pre-owned, or somewhere in between. If you've seen it in a real gym and want it in your basement, John can probably get it. Probably. (He can definitely get it.)

🔥 Featured

technogym.com

Brand New

Via Gym Tech Fitness

Want the new car smell? Fair enough. John sources commercial-grade new equipment through Gym Tech Fitness — the heavy stuff that doesn't wobble when you rack it. Ordered, shipped, delivered, assembled. You just walk in.

Pre-Owned & Inspected

Via PreOwnedGym.com

Same brands. Same commercial build quality. 30–70% below retail. Sourced from real facilities — hotels, gyms, universities — inspected personally by John before a single piece ships to your home. The smart play if you want Life Fitness without the Life Fitness price tag.

Whatever You're Building

Every Category.
One Guy Who Knows All of Them.

Whether you're building a full cardio suite, a serious strength room, a functional training space, or just need the floor done right — John's seen every configuration in Nassau and Suffolk and knows exactly what works in your kind of space.

Not sure which category you need?
That's literally what the free consult is for.

John comes to your home, scans the room, and builds a 3D layout showing you exactly which categories make sense for your space, your goals, and your budget. All in the first visit. All for free.

Via PreOwnedGym.com

Stop Paying Retail for Equipment
Built to Outlast You.

The same commercial machines you use at the gym — Life Fitness, Precor, Cybex, TechnoGym — were engineered to run 8 hours a day for 20 years. When a hotel upgrades or a facility closes, that equipment goes somewhere. John knows exactly where.

The Marriott Treadmill Argument

That treadmill in the Marriott fitness center? A guest uses it for 45 minutes. Then another guest. Then another. It runs somewhere between 6 and 10 hours a day, every day, for years. It's built for that. When the hotel upgrades to the newer model, the old one gets sold — and it's got 15 years of life left in it.

You're not buying a used treadmill. You're buying a commercial machine that's logged fewer hours than most consumer treadmills log in their entire lifespan. Same frame. Same motor. Same belt. Fraction of the price.

30–70% Below Retail

A commercial Life Fitness treadmill retails for $8,000–$12,000 new. Pre-owned through PreOwnedGym.com? John has sourced the same model for under $3,000. Inspected. Serviced. Delivered to your door.

That's not a discount. That's a different category of buying decision.

John Inspects Every Piece

Not a warehouse crew. Not an automated checklist. John personally evaluates every pre-owned unit before it ships — frame integrity, motor performance, belt condition, console function. If it doesn't pass, it doesn't go.

You're not rolling the dice on Craigslist. You're buying through a certified broker.

Don't See It? John Finds It.

Want a specific TechnoGym bike or a Precor EFX in a particular color? John leverages the full PreOwnedGym.com network to source specific brands and models. Tell him what you want. Give him a few days. He usually finds it.

This is what "I know a guy" actually means when it matters.

Available Pre-Owned:

Life Fitness Precor Cybex TechnoGym Matrix StairMaster True Fitness Hoist

Inventory changes. Ask John what's available now.

Looking to Buy

Want Commercial Equipment at Pre-Owned Prices?

Tell John what you're looking for — brand, category, budget. He'll check current PreOwnedGym.com inventory and source it if it's not listed. Free consultation. No pressure.

I'm Looking to Buy

Looking to Sell

Got Equipment You're Not Using?
John Can Move It.

Upgrading your facility or closing a gym? John brokers the sale of commercial equipment through the PreOwnedGym.com network. He values it, lists it, and finds a buyer — so you don't end up with a $6,000 treadmill that nobody comes to pick up.

I Want to Sell Equipment

Nassau & Suffolk County · Long Island, NY

Stop Coordinating Five
Different Companies.
Just Message John.

Equipment sourced. Layout designed. Delivery scheduled. Installation handled. One conversation. One guy. Done.

"You know how people always say 'I know a guy' when you need something done? I am that guy. For gym equipment on Long Island, I'm the guy."

John Mavros

Founder, iBuildGyms — Nassau & Suffolk County

Start Here

John Mavros

Gym design. 3D layout. Equipment sourcing. Free in-home consult. He's the one call that covers all of it.

ibuildgyms.com

New Equipment + Service

Gym Tech Fitness

Brand new commercial equipment from the top brands. Plus ongoing service and repair so your machines stay running. John's go-to supplier.

gymtechfitness.com

Pre-Owned · 30–70% Off

PreOwnedGym.com

Inspected pre-owned commercial equipment. Life Fitness, Precor, Cybex, TechnoGym, Matrix. John is an authorized dealer and certified broker. Same quality, fraction of the price.

preownedgym.com

Delivery + Installation

FitMovers123

Nobody has ever moved a 400lb leg press and thought that was fun. FitMovers123 handles delivery, removal, and professional installation so you don't have to find out the hard way.

fitmovers123.com

Ready When You Are

John Mavros

Founder · iBuildGyms · Nassau & Suffolk County, Long Island

Phone

954-234-4393

Email

john@ibuildgyms.com

Hours

Mon–Fri, 9 AM – 5 PM

Service Area

Nassau & Suffolk County + NY Tri-State

📱 Not ready for an in-home visit? John also does 15-minute video call consults. Same expertise. No commute. Just book through the contact form.

What Happens Next

You reach out. John figures out the rest.

Tell him what you're working with — room size, budget, goals, whether you want new or pre-owned. He'll come to you, build the 3D layout, show you what fits, and give you options. You don't need a plan. You just need to message him.

You send a message or call — takes 90 seconds.

John comes to your space, scans it, builds a 3D layout in real time.

Equipment sourced, delivered, and installed. You just show up and lift.