My son and I are looking for a couple of slightly used kelty packs: a cache hauler and trekker 65. Are there any sources or forums you might suggest we look at to find one? Thanks

searchtempest. Search craigslist ads near you. Also ebay.

Watch rokslide forums. Lots of packs go on there. There was a Kelty on there last week if I remember right.

Put a WTB in the classifieds here and check your local used sporting goods store.

Just picked up a Gregory Forester at a thrift store in like new shape and an Arcteryx Bora 75 that has seen a little use but still in great shape. But it is just dumb luck to be in the store at the right time.

It is amazing the fine packs available on forum classifieds....
As was mentioned, keep your eyes peeled and be prepared to save major kwan. I upgraded my wife's osprey last year year here at the fire for $45!

The money spent on the "latest and greatest" backpacks is ludicrous....many are no better than those that are a fraction of the cost.