[QUOTE=ewmayer;603627]2 of the 3 R7s in my 3-GPU open-frame desktop rig have been nonfunctional since last fall due to issue detailed in the copied-below e-mail thread between myself and Mike/Xyzzy.[/QUOTE]"Lights & fans on but nobody home" Radeon VII corpses sell "for parts or repair" on eBay for ~$400 each.
(Not detected by OSes, or detected but error message & no display or OpenCL computation)

Fully functional used no-warranty-from-manufacturer resell usually $1000+ recently.

Time is not on the side of the sellers, with prices trending down, & newer models out with warranty.

For those with an interest in Radeon VII compute, eBay prices have dropped below $700 thanks to the crypto crash.

Occasionally under $500 recently, though there's a great deal of variation in listings & auction results.