Quote from: judithmcb94 on April 02, 2018, 09:10:19 AM

Hey i have a keep key walelt i want to get rid of because i never use it. I want to sell it for 100$ as I got it for like 135$ - thats fair i think. the box has been opened and i've set a code on it which i will give to you and you can prove it works etc.
i know its going to be hard to do this due to trust, but we will work it out to the point that we trust each other. serious buyers inquire within, i can give information so you know that i am not faking. just a college kid who needs money!

Best and only way forward is to use a trusted forum escrow on this list:

https://bitcointalk.org/index.php?topic=2439910.0

As for the device itself, buyers are naturally concerned about the risk of it being fraudulently engineered or tampered to give the seller backdoor access to the wallet. It might be difficult or even impossible to do such a thing but the possibility still exists. For example, the device might be a picture-perfect replica of the original. Thats just one scenario.