A place who marks up someone elses work. "Exclusive" is a middle-man parts store. They do carry stuff the conventional parts places don't (under car and other lighting kits, stereo kits, various wire mesh, red/blue/yellow corrugated tubing). They can get your parts chromed, gold plated. However, they can order just about anything, have your old rims sent out to be refinished / restored, various coatings...that sort of thing.
Like I said, they are middle men. They have a lot of connections to suppliers and shops that do all sorts of work. If your not into working and building cars, these guys have a lot of answers. However, I went in there looking for stainless steel wire mesh and 3/4" to 1" ABS plastic sheets and they referred me to ebay.
I think they'll give you a small % off for putting their big decal on your windsheild or rear window.