Porting # over to cricket question

So I just bought a Blu Life One X on Amazon for $150, I am on Metro PCS I was about to switch to Cricket with just a cheap sim card for $9.99 on their website BUT I saw the galaxy grand prime for $30, so my plan is to get the Blu Life One X, Port my # over to cricket, buy the Galaxy grand prime for $30, take the Mircrosim out and put it in my Blu phone, then put the galaxy on Craigslist for $60 and make $30 off it on top of switching to cricket which I wanted to do in the first place. Will anything get in my way of doing this on crickets end? secret fees or anything from putting my sim into an unlocked phone.