eBay
This is my well-used go to haul bag for the last several big wall ventures. Fish Products is a great manufacturer, and this haul bag is one of their best values. A few years ago I sent it back to Fish, where they added the drain hole and upgraded a few straps on the suspension system. 

Being one of the older versions of this haul bag, it's actually a little bigger than what is currently advertised. 

This bag should have a fair amount of useful life left in it. I would say several more walls. At this price, it's a great way to get a first "try out big wall climbing" bag. Or a good way to have a second haul bag for the bigger endeavors. 

Be sure you understand the condition: This has been on five big walls, has one 1"+ sized cut (which may or may not require repair), about 4-5 small ding holes and the usual amount of scuffing from the wear and tear of Yosemite granite. There is also one quarter-sized scrape injury on the storm collar---see photo with yellow object showing through. Inside is my name written in sharpie, along with an expired phone number. 

Carabiner shown is not included. 
Buyers only from the U.S. please. 
I will ship by the next day upon receiving payment. 
Flat shipping rate for two-day priority: $18. 
Paypal only---or cash allowed for local pick up. 
No returns. Sold "as is." 

From the Fish Products website:
BUDGET HAUL BAG
A no frills alternative for the wall climber who needs a second bag for those really big walls, or is just a little short on the folding green. We've upped the size a bit to 33" tall, 17" bottom, 7500 cu.in. The padded shoulder straps are 3" wide for comfort, and the Budget sports a fully padded 3" wide waist belt. The shoulder straps and waist belt are easy to remove for hauling. Made from our 28oz White or Green Vinyl haul bag fabric for long life and comes with a built in adjustable daisy chain for docking at the anchor. Voila! Wall ready. This is also an excellent "first bag" to get your feet wet with. No need to load up on an expensive haul bag before you find out if wall climbing is your game. Plus, you can use the money you save to see a psychiatrist after you bail off your first El Cap route with your mind on fire.