It was $3795 new. It is no longer a rare item. It is the current gen item for FLIR.
Figure for rare items 10% is about right.
15-20% for common items.
40% off for “last years model that this years model thrashes”.
Non-transferable warranty is not good in this case - not original purchaser = totally fucked if it eats it in a month.
Cosmetic damage takes another 5% or so if it’s just light.
I would price it at $3200 and negotiate from there.