Yes, same here. I got asked for receipts twice, but that was only after I repeatedly turned down their ridiculous price suggestions. Both time I ignored the requests for receipts started a new listing. After few rounds of that I think I drained them, 'cause my items got accepted without receipts and at a price only 50-100 bucks less than my original price.
It's ridiculous really. I don't understand their logic. If I'm willing to accept their price suggestion, they don't need a receipt, but if I insist on my price, proof of purchase is needed?
So for example, at $2000 ---> yeah, no proof needed. Probably authentic and their authenticators can do a check.
At $3000 ---> you better cough up the receipt, item hard to authenticate at this price, so proof of purchase is needed.

