No ideas off hand but garage sales and flea markets are always a good place to get things you want and/or need. Just watch what your buying and make sure it is something you'll use and is in servicable condition. It is pretty easy to collect a lot of "stuff" that you tote around and don't use. Even with our big "5th" and the truck to pull it, we think 3-4 times before adding any new camping gizmo. When we do, we usually remove something else. Keeps the trailer light, fuel costs down and gives me less I have to fool with.
Also, the idea of bartering with your "extras" is always a great idea. Hope you can make that work.
Just my

! Good luck and,
Happy Camping!
__________________
Turn Key, DW and Pepsi & Cherry, The Camping Boston Terriers
'03 Chevy 2500HD, 4X4, X-Cab, Long Bed
'04 K-Z "Durango", 275RK ("Sunday Haus II")
Twin Kayaks, "The Ride" by Wilderness Systems
North Central Texas, Where The West Begins!