I think I paid $399 NEW for my Sapphire reference model Vega 56 a couple years back.
$180 seems reasonable.
I have 2 sapphire pulse two fan.
I have 2 msi air boost blower style.
free shipping to usa.
180 for any 1
350 for any 2
510 for any 3
650 for all 4
I would consider any reasonable offer for them.
which means a bit lower then above works.