To me one of the most critical factors stemming from whether or not the ban is allowed to expire is: Will the expiration of the ban hurt the value of pre-ban firearms?
I think there are several dealers who would just as soon not see the ban lifted, having invested heavily in hi-cap mags and pre-ban rifles.
But in looking at pre-ban rifles that are available, I don't see how letting the ban expire will really hurt the value of very many of them. You know, it's the tendancy of gun people to think that things built long ago are better than those built now. This, coupled withthe fact that so many "preban" firearms were banned not by the 1994 ban, but by the 1989 ban, leads me to believe there are still fine investments out there regardless of whether or not the ban expires.
Of course, the imported assault rifles cut off by the 1989 ban will still be restricted even if the 1994 ban expires. Chicom AKs and the SKS were once largely considered junk, or at least, low quality, back when they could be had for little money. Not that I'm saying they were junk, but many people had that impression. Now, many people believe the Chicom AKs were the best ever available, and few deride the "value" of the Chicom SKS. See how good the water taste when you can't have any at all? The desireability of such rifles will probably not be affected at all if the 1994 ban expires. There will still be people who claim the Chicoms are the best, and they will hold their value for that reason.
Another example, the Springfield Armory, Inc. M1A. The earlier (spelled pre-ban) M1As were put together using mainly US Government surplus parts. The ones but together now are assembled with many parts of (what some would consider) inferior quality. This is setting a senario very much similar to the "pre 1964 Winchester" craze. That is, there will be a lot of people saying the early ones were put together with higher quality parts, and are worth more because of that. Regardless of whether or not this is REALLY true, those who have invested in such firearms will insist it's true, and not be willing to sell their weapons for a loss.
For that matter, how many "preban" manufacturers are completely out of business due to the ban? Look at Calico. That is an example of one firearm that will never return, even if the ban is lifted. It will retain collector's value even if the ban expires. And even if some company comes along and decides to copy them (make new ones) there will be those who insist the earlier ones are better. The price will not go down.
In buying firearms with the sunset approaching, I'm taking these things into consideration. Don't be surprised at all if the price of many "preban" firearms doesn't go down one lick even if the ban is allowed to expire. I tend to believe the price of many of them will hold firm, or even rise.