Consider yourself lucky you passed. That looks to me like a repainted Tarantula figure someone probably bought on clearance.
I can't quite place the torso, but it looks like the Hand Ninja, or more likely, Ronin.
In all likelihood, someone carefully took out the original figure and BAF piece and then replaced them with the copies so they could return it for a full refund.
Pretty lame scheme, but it happens. I actually admire the effort they put into repainting the parts though. Of course, it could be a factory mistake, but I doubt it. Even if that were the case, those types of errors are hard to put a value on, and most experts will tell you they tend to be worth less than the regular figure because so few people collect things like that.