Like anything else you have deals and you have ripoffs. I see used SIG's at gun shows and in gun stores priced higher than new SIG's.
I saw a couple of VERY good deals on used SIG's today at a gun show; going to give the dealer a ring tomorrow and pick me up a like new German P220 in 9mm. LOTS of overpriced ammo and I mean LOTS. Reloads priced higher than new in the box for range FMJ pistol ammo etc.
A gun show here (Tulsa) this weekend charges $14 dollars to get in.
I thought it was bad around here! They only charge $10.00 on average...I guess Chicago area is not the most expensive for once.