This is really funny, one little mod creating so much talk. I did a search on Sprint Booster and got an unbelievable number of thread's one of which has 507 replies alone and the same questions are ask.

I am curious though, Why is there talk about a group buy from slkfans if he cant provide any product and doesn't even answer emails but hey thats just me. Also if $20 or $30 is a deal breaker... I don't know.
My only advise, get one it's worth every cent.