It is a legit board. If you Google around, it's essentially a promotional snowboard for Pabst Blue Ribbon (duh) made by K2. I believe it's really either a K2 Parkstar or a Darkstar... One or the other.
As for the defect, I can't really see what I'm supposed to be looking for. Is it sidewall damage or something on the topsheet? Generally, top sheet stuff isn't going to affect performance, but I won't pass that judgement unless I can really see what you're pointing at.