I'm no expert in these to say the least.
Aperture is very fluid as is the focus. Blades look good. To me, the glass has some haze, so I'd suspect cleaning might help. I'd almost do it myself, but I'm not that vested in the lens so opting to not fool with it for now.
From doing some research, it appears these range anywhere from $400 up to $1000 in mint condition. So, trying to price accordingly.
Will I trade? Maybe so. Hasselblad items (120 film backs, etc) catch my interest, as do other items for my Leica IIIf.
$600