I was at the IME consignment shop yesterday and noticed that they have a bunch of used cuben fiber roll top packs for sale, ~30 liters. Some are $100, others are slightly more used for just $50. All the ones I looked at have plenty of life left in them. They seemed well made, with a deisign not too much different from my ULA Ohm. There's a big mesh pocket on the pack, mesh side pockets, wide hip belt with hip pockets, comfy shoulder straps and a sternum strap. I didn't recognize the brand name and have already forgotten it - sorry!
Probably worth checking out for anyone in New England looking to pick up a cuben pack. There was also a used cuben dry bag with shoulder straps upstairs for $20, ~18 liters.