That ebay auction sounds like a really good deal then. The material cost alone for a Solo belt is about $100 and it takes a good deal of time to make one by yourself. I had to make the buckles with a bench grinder, it took me 3 days just for those. Granted, I can do it much faster now that I know what I'm doing, but it's still time consuming. If we end up making them the buckles will be made by someone else, as well as the belt disk and droid caller holder. If all that stuff is made by someone else I can make a Solo belt to measure in about 5 hours, not factoring in dye set time.
EDIT: Also, I just looked up that ebay auction, the belt itself is made a bit wrong in that it's adjustable. Also, the buckles are made of aluminum and not steel, so they'll probably break after a while and the leather looks to be no more than 5 oz. and you should never make a belt out of anything thinner than 8 oz. And there's something not quite right about the blaster, but that's not really important.