I'm not sure how I could show proof of ownership. If a serious buyer contacts me I can arrange for a same day visit to my warehouse for inspection. I will accept escrow but would probably need cash payment. I will be selling these well below my cost so I'm hesitant to publish a price. I'm looking for any reasonable offer. Is that enough info, or still need to provide more?
You can show us proof of ownership by making screenshot of the product you are selling including your bitcointalk username.
Also if you like to receive payment in cash, that means the escrow need to receive the cash and once the buyer got his product and confirm everything as it should be, he will redirect you the cash which won't be free for sure (depends how the cash was send).
You didn't mention which company you using for shipping, how much it costs and where you are able to ship.
If there is import fees do you cover them aslo, whats the price per unit and things like that.
No one will take you seriously if you don't provide full infos and everything that buyer will need to know.
Also "minimum of 100" sounds like you will never find anyone..
Lets say 1gpu worth 500 usd, your minimum is 50,000$ usd ?
That's not serious.