Should I purchase a Ball python from a PetSmart?

[Praireboyfarmer]

I've decided that I want a Ball Python. I've been putting back a little cash here and there. I went to the Petsmart today (to pick up Crickets for my tarantulas) and they were running a sale on two young (and snappy!) ball Pythons. Well coincedentally I have just enough for it's sale price and everything I need to get to go with it. They had just come in a few days ago (or yesterday actually) and they were very stressed. I've asked about their source and they said they buy from a place called "Reptile Industries" which in turn buys from (according to her) certified, reputable breeders.

Is this a good deal though? I was planning on going to a upcoming reptile show and bringing 350 dollars to see what I can get, but going the PetSmart route would save me nearly $100 (well, I don't know how expensive the Reptile show will be) and I'm admittedly tight for cash right now (Trying to get a storm shelter before next Tornado season)

If this is a bad idea though just let me know. Be blatant.