$50 is a good round number, you'd be pretty hard pressed for any more. If anybbody has upgraded, they'll have 4.10s laying around, so they are everywhere, and hence a diem a dozen.
Really only hold any value if they're from a V6 model, beefier case.
Given the weight of the things, you could probably get $10 just for recycling them...

With 200+ Billion electrical parts, the world most complicated machine is inside your own skull.

Question Reality.
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'89 Rnr DLX "SR4.5", 32s w/ 5.29 locked f/r blah blah