Samsonite via eBay has Samsonite Tote-A-Ton Duffle Bags [ebay.us]
on sale for $18.99 each but the product currently qualifies for a promotion of EXTRA 15% OFF $25+ (no coupon/code necessary).
Just add 2 bags and discount should be shown in your cart at checkout. FYI - discount seems to calculate based on your total after tax, which varies by location. So before taxes, you're looking at an approximate total of $32.29 for 2 bags (~$16.15 per bag). Free shipping.
This price is comparable to previous frontpage deals that were also in the range of $14-$16 per bag. Currently being sold for ~$28 per bag on Amazon. As of posting, 4 colors are available: Black, Purple, Red, and Turquoise.
Refer to previous frontpage posts for reviews and suggestions on what these bags can be used for - storage, travel, dead bodies, extra bag to keep in luggage during trips. I personally stock up on these mainly to help pack and transport items when I move.
My only gripe about this bag would be that I once tried to use it to carry 2,000 pounds of gold bars (obviously just a fraction of the sweet savings from all my slickdeals) but sadly the bag could not actually support a metric ton as somewhat (fraudulently) implied in its name. Still, I think it's quite a useful large general purpose duffle bag for the price/size/quality. I've been keeping an eye out for these and they only really seem to go on sale randomly a few times per year with limited stock.
Hope this helps someone else. Please feel free to thumbs up and rep if you find useful