The fact that SVS doesn't offer any deep discounts supports the notion that their pricing is fair and competitive and that demand is consistent.
If you find nothing in their frequently changing Outlet which appeals and you're looking to save more than 5%, then you need to look at the used market. Audiogon's subwoofer section currently has a SVS PB16-Ultra, two SVS PC-2000s in Piano Gloss Black and a SVS PB-13 Ultra. This is where I picked up my two like-new SB-1000s for a very attractive price. For local shopping there are sites such as Craigslist.