Going rate for 5100's?

I came across a set of 5100's complete with coil springs and ready to mount that have about 1000 miles on them. I know a new set is around $350 but what would a nice used set like this go for? I do like the idea of these being ready to mount and I would think that adds some value but how much?

 

Welcome from NY.

Check out this place

https://www.xkstensiveoffroad.com/s...(Free_Shipping_Lower_48)_(PT#_24-232173).html

 

Welcome from Ohio.

 

You can buy assembled 5100's here for $600:
https://4x4.fatbobsgarage.com/mobil...lovers-w-bilstein-5100s-2007-2018-p33926.aspx

I would think around $400-450+/- would be a great deal? Fat Bob's has no name assembled coilovers for $500, so having actual Bilstein should help the price.