Unfortunately, the new regs back in July had dealers selling suppressors closer to MSRP so prices actually increased. Luckily, the prices have normalized as the demand has decreased. The only way you'll see prices drop further on NFA items is by deregulating them.
Best case scenario based on what is on the table now:
1. Hearing Protection Act (HPA) introduced in Oct 2015 is passed and suppressors are removed from NFA restrictions
- With the removal of suppressors, the backlog of other NFA items like SBR, SBS, MG, SBS, AOW, etc. will decrease and we'll see the turn around times go back down - prices will remain the same for these firearms
2. With suppressors only requiring a background check like any firearm, existing inventory will be depleted so finding any in stock after it passes will be almost impossible - dealers will probably raise prices on existing inventory to maximize profit
3. New manufacturers will enter the market to help supply the increased demand which will lead to innovation which will also lower costs
HPA is positioned as a public health bill so it has a better chance of passing sooner since it will still require a background check (aka satisfy democrats). As opposed to removing full-auto weapons from the NFA which is purely a 2A bill.