Cost is a factor, but only to a point. I've bought some things that I wouldn't normally have bought, but it was a great deal, so what the heck. Quality, though, is the overriding factor. There are a few vendors who charge higher than average prices, but I'll snap their stuff up because I know I'm getting a great value, even at the higher price. Most vendors I'll decide upon on a product-by-product basis, factoring price vs. quality vs. versitility. Other vendors I'll buy only if it's a very good price. (And a few vendors I'll never purchase from due to low quality or horrendous service, but thankfully there's very few in that category.) I've also seen some incredible deals for well-crafted items that I absolutely don't want, so I haven't purchased. I'd hate to have a public, or even merchant-only, area that showed how much everyone sold. If people want to share the information, they can post their sales info themselves. There's a lot of ugly politics that can happen if the sales information is distributed. While I know that most vendors are good, honest people, jealousy and envy are very human traits and could spill out with such public disclosures. Cheers!