Quite right about the dealers with large inventories--Wholesale Hunter, the various CZ discounters, etc. It is quite a number of pages to wade thru but I find it easy to skip over the block listings. Most of the guns I have bought internet and all the ones I've sold except a couple thru the for sale listing here were on GB. Sometimes there are deals to be had from the non-serious seller--clean SBT at a chopped and channeled price from a handgun dealer, early 3-screw Blackhawk which had been shot AND taken care of by an individual who knew exactly what he had but neither bothered to list as such (altho pictures were adequately revealing), didn't bother with a reserve and didn't gouge on his starting price. Thad Scott, whom we all know and who would have to be taken as a serious dealer. has been known to dump a few utility bill "healers" at GB although he lists on GA as well as his site. Brian Perone, who is perhaps serious and scrupulous above and beyond the size of his inventory, has been known to list at GB. We all have our favorite and are allowed to differ on the convenience of the site and the satisfactory deals had therefrom. I like the auction format as time spent with your "broker" is revealing of what the market will allow and command rather than demand.
jack