I'm sorry for you. A huge disappointment. The shame is that the seller ought to have all this explicitly mentioned in the ad with at least a close-up of the hole.
Have you seen those two ones with the Detroit car colors ? They are at a bargain currently. If you like these colors and the black PG... and some sick of ebay.
I bought it from Portland Percussion in Portland, ME (they sell guitars too apparently). I spoke to the guy who runs the bass section and he says that he feels that it's just a natural wood imperfection. He's seen it before. I've had G&L's with some pretty open pores but nothing like that.
. Keeping my SB-2
...