Well it matters, if its some midz, than you could get like 40 bucks for a whole ounce or 30 for half an ounce. and if its dank stuff or exotic weed, then some could be 30 bucks a gram.
-40 - 400 usd
40 or so
40% of 38 = 38*40/100 = 15.20 dollars
38
38 x 40 = 1,520
3100 dollars
38 x 40 = 1520
You haven't given enough information. It depends on what brand and model. Some 38 revolvers are worth $30 or $40. Some are worth several thousand.
Check
40-300 USD or so
95% 38/40