[cornell2005]

you made the right move, first call of re-raise was basically to play it for a set.
in 100NL min-raise on first raise equals monster more often that not i think. but for a tricky player, this min raise can just be used to put you on the defensive and thinking hes at AA or KK, which he is sure you dont have because of your 15 dollar preflop bet. but this type of move isnt as common and isnt as useful even in these games, imo most players use the min raise to try to get a bit more money in the pot with a monster hand.
no brainer fold here i think, but with a call preflop to try for a set and see what he does post flop. if hes a very tricky player then reconsider i guess, but id hate to put my stack on the line on the bet that he is bluffing