The price list here is the only one that I know about, and even that one mentions that complete kits can sell for substantially more than loose carts. The harder it is find a complete kit the more they tend to get (i.e. SVC Chaos kits would sell for less of a markup over a loose cart than a Sengoku 2 kit with matching serials). Neotropolis is trying to get 1100 bucks for a kit of V-Liner on eBay, which is a little more than triple the high loose cart price. However Neotropolis also tends to go fishing for prices from NGF Big Tymers. Kits I've purchased tend to be about 20-30% more than loose carts, although they were for rather common games.