Who the fuck would pay $5,000 for a $1,500 miner??? Shit I got 15 I will sell for $5,000 right now... That would be the $52,500 I will ever make.
I think the btc amount is more relevant than the dollar amount. I believe these were going for 0.22+ btc with the psu from Bitmain when sales were open. At $15,000 a coin, you would be paying 0.33+ btc
Regardless, doubtful you will get $5,000 on the forum but Ebay/Amazon may bring in close to that minus fees and potential fraud on buyers behalf