What's the average price for a lens at a pawn shop?

For a nikon slr body.

Depends on the lens and the pawn shop. You need to go shop around and see the prices to tell.

It depends entirely on the specific lens and the condition it's in. They can go anywhere from a few bucks to a few thousand bucks.

What is the average price for a used car at the local car dealer?

How long is a piece of string?