On the other hand (don't give up hope!) i am expecting to see a surprising large number of NIB, since June 1 purchased pistols (for example I see a G17 up for about $2k), that, as we get closer to the transfer ban, the speculators may realize they are going to be sitting on some pews that are worth exactly $0 to them (or at least they can't turn them for a stupendous profit). Maybe it will be 'karmas a b###h', or maybe there will be a few people that get nervous around oct 4 and drop the price to "best offer" (and some may play chicken with when they think the ban will happen, which will result in a few getting hit by cars and a few dropping the price drastically right before it happens). Some guns will never drop in price (you'd be selling your firstborn to pay for what I'd be willing to accept to sell one of my G40s), and some other guns will drop back to earth-based prices once people realize the buying market is finite. There's always the unicorns (aka 10mm) that will get a premium. Just maybe not a 400% premium.
If you are buying, its time to stop kicking the tires (actually the time for that was June 1) and pull the trigger. For those sitting on restricted guns with the thought of making bank, the real question is, how brave you gonna be?