To trade or not to trade...

[umegames]

Curious to know, what is everyone's process for deciding whether or not to trade-in a game or not.

I'm currently struggling over some games because of the $ back from best buy + the fact that its likely i wont want to play them again, but most of the time with nintendo games i end up regretting selling them. the 3 games are:

 

Yoshi island DS -$10.50

New yoshis island - $24

kirby triple deluxe - $16.50

 

your thoughts on trading these in would be great, but I'd also like to know with games in general