I'm not at all seeing the debate on whether it's a fire spider or not...everything about it, even with bad pics, looks like a spider.
What do you want it for? To breed? Do you want to breed a spider male OR do you want a fire spider male for breeding? Are you looking for a good deal on a snake figuring you'll pick it up on a whim and figure out what your plans are for him later? If you don't really want a spider male to breed, regardless of price, you probably shouldn't buy it. If you want one for a pet, have at it.