I will chime in on my thoughts about what will happen to the value of Chinese AK's if the ban does sunset, and isn't replaced quickly. I think that the value will come down, I think this for several reasons. The first reason is the only reason that they are so expensive right now is that they are in limitied supply, and there is a signigant demand, prior to the AWB there were other AK's on the market, but the vast majority of what was available was Chinese, so today if you want an underfolder AK that actually folds your only choice is a preban, and once you get to looking you will find that for every preban AK you find for sale that isn't made in China there will be ten Chinese rifles in similar configuration, what I am getting at is the for now when talking preban, the chinese rifles are the only game in town. I believe that absent the ban there will be an abundance of AK's with evil features available (think SAR1's with folding side folders and bayo lugs for well under $400), so that will eliminate alot of demand for the Chinese guns right there, of course there will still be the more discerning buyers who want the superior quality of the Chinese guns, and they will still be willing to pay for that quality, which will keep the prices of like new Chinese rifles inline with what a high end custom build or US made gun goes for.
To make it short with a steady supply of sub $400 evil feature sporting rifles becoming available the demand for the "preban" rifles will diminsh expotentially, however the demand for a well built high quality AK will keep the value of the chinese guns higher than what a NIB SAR1 will go for, regardless of how many evil features they have. My guess would put a LNIB 7.62 Norinco, with bayo lug and underfolder selling for around $650-$750, and only slightly less for the non folders. Also don't forget that there are hordes of MAK90's out there that will be fair game to add required US content, that will probably go pretty cheap, being that they aren't "true AKs" ( there is a stigma that comes with a Thumbhole stock that all of the synthetic furniture in the world can't wash off). I myself will be looking for deals on MAK90's starting about the third week of Sept. (I want a Chinese underfolder real bad, but I am not willing to pay big bucks for a preban yet).