Messed up and bought 2 iron sets, what should I do?

So basically I ordered a set of Taylormade M2 clone irons online, but then found a set of clubs on Craigslist that includes Taylormade '09 Burner irons for cheaper than the clones, just in used condition. Couldn't cancel the order for the clones, so I'm asking for a recommendation. Do I used the Burner irons in used condition or should I go with the clone irons. I really don't know what to do here.