Escrow ok also but I would split it in some parts to see if all OK I wouldn't do 40K in one go. For 1GPU maybe its not worth to make pictures but if you do for 10K+ what's your problem??? If no explain reason why you cant and I think from there.
Don't get me wrong, the forum is full of scammers and we need to be aggressive to people not open for safety trades.
Im not selling any gpu's to explain you what's the problem but even if i decide to sell 200 gpu's im not going to screen more than 5-10 gpu's for proof of ownership.
Why ? Because its the same i screen 5 or 500 cards consider im using escrow.
Seems like you don't get the full escrow idea.
Buyer deposit to escrow, seller send the goods.
Once the buyer receive the goods and confirm all is okay then the seller receive his money.
Why the hell someone will waste time making pictures consider he's obliged to send the agreed amount of gpu's in order to receive his money.
It makes no sense to start deal with escrow and not doing your part because you will only pay for shipping fees and so but won't get single cent from the entire deal.
So that's why i think that kind of pictures are useless.
No one will agree to use escrow if he's hiding something.
Simple logic.
P.S: Pictures are for windows shoppers.