I have become obsessed with checking the local Craigslist. If you are unfamiliar with it, it's sort of a cross between your local feed store bulletin board and ebay but completely and totally free.
Not only can you find good deals on the site, it evidently has a huge viewership even in the ag sections. We put a few steers up on the site in late May when I was knee deep in diapers and somebody had backed out on a few steers they committed to buying earlier in the season. We got three calls within 24-hours on the steers.
Stuff listed on Craigslist gets attention QUICK. Take this example...
CM Stock trailer---I think 14 ft, bought approximately 5 years ago from D&D in Seguin, in very good condition, has small dent in front, one small rusted place, and a small cracked window. Floor boards have little to no wear. Wired for lights, used only to haul 4-H goats and the occassional trip to the dump.
We are moving and need to sell the trailer in the next few weeks.
They were asking $1,000 for that trailer. Now I have no need for another trailer but a 5yo D&D 14 ft trailer is worth significantly more than $1,000 and for that price I could find a use for it. The ad was listed at 7:30 PM on a Tuesday night. I e-mailed at 9:30 that night and it had already been sold.
To find your local Craigslist page, just go to craigslist.com and then click the most relevant regions you can find. Then look under "For Sale" and "Farm+Garden".