I just bought that exact large sig duffle, in black, off of ebay about a week ago. With shipping I paid $115. and it was in excellent condition, so I think I got a good deal.
You need to watch out for them on ebay, if you watch some of the auctions you could probably easily get one for under $130.
I'm like you, no outlets around me, there's one about 1 1/2 hours from me, but they don't carry signature stuff (which is all that I have in my collection so far)
Good luck in trying to find one.