I had some issues buying the other day, too! I clicked the BIN and confirmed that I did, indeed, want it, but when it came to actually purchasing it, it kept telling me to try back later. Tried exiting and buying it through my cart, which eventually worked, but not before I had that sinking feeling that someone was going to be putting MY ebay name in Trader Support as a nonpaying bidder. I ended up logging out, logging back in, and going to my cart again. Might have been a placebo treatment, but it finally worked.
I'm glad it wasn't just me. I mean, I'm sorry everyone else had problems, but I do love your company.