I would advise you to get your money back. If you bought it in person then you should of taken the proper steps in buying a used unit by fully testing it to see if it was in 100% working condition. If you bought it from online then you have every right to file a dispute and get your money back.
Yes BD emulator works but that is never 100% most games you will encounter it will require a disk to be inside for you to play it. Blu Ray drive is an important part in your ps3 and that need to be working at all times.
So 65% backups work discless but 35% (mostly good games) you will need a disc for.
Ps3 Phat 250gb 4.31 OFW (Currently Playing Dead Space 3 [Chapter 10] / Hitman Absolution / COD MW3 )
Ps3 Phat 80gb 3.55 CFW