This is the only Record Store Day release I care about. I think they're only making 500, so I hope I get one.
Per this post, it appears to be 750.
"Anyhow, another exciting thing that's happening is we're doing another Record Store Day record. Last year if you remember, we co-ordinated it so we released a 7" with 10 different covers, all featuring a different record store on the cover. Probably entirely because of that, record stores managed to survive another year, so there's gonna be another Record Store Day this year. So we decided instead of recording any new music, why don't we just release this compilation album from 1977 we'd been sitting on since from before we were all born?
We found like 750 copies of this great comp so we're gonna just use that."
http://lookingforgold.blogspot.com/2011/03/hi.html