I believe that would all depend on where you traded it, and for what.
250 or so
100-450 USD
40-800 usd
50-400 usd
Used, maybe $200 tops.
A Smith and Wesson M&P 40 is a .40 caliber hand gun.
40-400 usd
100-350 or so
20-40 USD or so
0-400 USD depending on condition, box, papers, accessories, etc..
No
Nothing.