What is a reasonable price to pawn an iPhone 4 s?

It is about a year old.
Very good-perfect condition. (no scratches or cracks and works perfect)
Only used it for 3 months until I got a different phone and plan.
Looking for the best and most reasonable price to pawn it and get it back later.

Added (1). It has been jail-broken, but not unlocked yet. It's a Verizon phone.

Unlocked: $170
Normal: $80

If you sell it on eBay, you'll get 4x the price for Unlocked and Normal 4S.