I bought a iPhone that is iCloud locked but imei seems to be good?

I bought an iPhone and they said it wasn't iCloud locked. I checked the IMEI and it said it was activation ready and what not but after I got home and started setting it up, it turned out to be locked. I have no problem with returning it as long as I get my money back but the guy says he's not coming back until Tuesday and frankly I don't believe him. What do I do?

You always have to check to make sure its not icloud locked before you pay the money. Chances are its probably stolen and you won't hear from him again now, he was hoping he would find a buyer that wouldnt check that.