Raw idea
No patent · No filings
- A written description in your own words
- The problem it solves and who has it
- Sketches welcome, never required
- Sold as a concept assignment, not IP
Typical range · $250 – $3,000
assets/hero.jpgEst. for the ideas that never got built
Sell the invention you're never going to build.
You had the idea. You didn't have the ten years, the capital, the workshop, or the patience. Somebody else does. List it here, keep it sealed, and get paid when the right person opens it.
No patent required at Tier I. Every buyer is ID-checked and under NDA before anything is unsealed.
1,142Ideas listed
318Sold to date
$1,800Median sale
100%ID-checked buyers
Denominations
Three tiers. The first one asks nothing of you but the idea.
What you bring determines what a buyer will pay. Most sellers start at Tier I and never move — that's fine, Tier I is the whole point of this place.
Documented
Evidence, no patent needed
- Everything in Tier I
- Drawings, specs, or a bill of materials
- A dated record of when you conceived it
- Any prior-art searching you've done
Typical range · $2,000 – $25,000
Protected
Provisional or granted patent
- Everything in Tier II
- Filing number and current status
- Working prototype, if one exists
- Assignment handled by counsel at closing
Typical range · $15,000 and up
The vault
Ideas currently for sale.
Titles and categories are public. Everything else stays blacked out. Two gates stand in front of the detail: a photo-ID check confirming you're a real adult, then a mutual NDA signed in the exact name on that ID. Clear both once and every listing on the site opens for you.
GB-4471-CTier I
Household · Kitchen
Refrigerator shelf that weighs what's on it
$900Seller in Ohio
GB-4468-ATier II
Tools · Jobsite
Tape measure that marks the wall for you
$6,400Drawings included
GB-4455-DTier I
Mobility · Accessibility
Cane tip that grips wet tile
$450Seller in Vermont
GB-4440-BTier III
Energy · Storage
Modular battery cart for job trailers
$48,000Provisional filed
GB-4432-FTier I
Pets · Care
Water bowl that logs how much the dog drank
$1,200Seller in Nevada
GB-4419-ETier II
Automotive · Aftermarket
Trailer hitch alignment without a spotter
$3,750Drawings included
Order of operations
What actually happens, start to finish.
You write it down
Describe the idea plainly. We timestamp the submission and give it a serial number the day it lands.
We seal the listing
The title and category go public. The description, drawings, and your name stay blacked out.
Buyers prove who they are
Photo ID and a selfie, checked for age and identity. Then they sign the NDA in that same verified name, or it doesn't count.
An offer comes in
You can accept, counter, or ignore it. Nothing moves without you clicking accept.
Funds clear, rights transfer
Payment is held until the assignment is signed by both sides, then released. We take 8% of the sale.
List an idea
Start here. It costs nothing to list.
Write it the way you'd explain it to a friend in a driveway. You don't need the right words for it, and you don't need to have protected it.
What we won't list
Anything already assigned to an employer, anything sold elsewhere, and anything that's a business plan rather than an invention. We'll tell you within two days either way.
What you keep
Everything, until you accept an offer. Pulling a listing takes one click and the signed NDAs stay in force afterward.
Straight answers
Questions people ask before listing.
Can I really sell an idea with no patent?
Yes — that's Tier I. What changes hands is the concept, your written description, and a signed assignment saying you won't pursue it or sell it again. Buyers at this tier are paying for a head start and for the fact that you thought of it first, not for enforceable IP. They know that going in, and it's reflected in the price.
What stops a buyer from reading my idea and just building it?
The NDA every buyer signs before viewing, which names your listing and is logged with a timestamp, their identity, and their IP address. It doesn't make theft impossible — nothing does — but it makes it traceable and expensive. If you want stronger footing than that, file a provisional first and list at Tier III.
Why do I need to show ID to look at ideas?
Because an NDA signed by "John Smith" with no John Smith behind it is worth nothing. Every buyer runs a photo-ID and selfie check through Profile18 first — it confirms you're 18 or over and pulls the legal name off the document. The NDA then has to be signed in that exact name, which is what makes it enforceable against a real person if a seller ever needs it to be. The ID images are held by the verifier, not by us, and sellers only ever see your name.
Does signing the NDA cost anything?
No. Signing is free and one-time. Once it's on file, every sealed listing on the site opens for you, and it stays in force for five years on everything you've viewed.
How do you decide what an idea is worth?
You set the asking price. If you have no idea what to ask, submit anyway and leave the price blank — we'll suggest a range based on what comparable listings in that category have closed at.
What do you take?
8% of the sale price, charged to the seller, only when an idea sells. Listing is free, and there's no fee for browsing or for signing the NDA.
Can I sell the same idea twice?
No. Sales here are exclusive assignments. Once you accept an offer, the listing closes and you're out of it.