Instructions
Visit record stores. It is hard to believe they still exist, but some stores still specialize in vinyl. Check the phone book or perform an Internet search to see if there is a store in your area. Research before you travel and find out if there is a record store where you are headed. When there is, take advantage of the opportunity to hunt through some new stacks.
Visit antique malls and flea markets. Sometimes the stalls are full of junk that someone is trying to make a buck off of, but should be thrown away. Keep a keen eye out for stacks of sleeves and seize the opportunity when you find a stash of disks for sale. Remember that price is subject to negotiation at these establishments -- use your bargaining skills to get a good deal. Check for damage before you buy.
Shop garage sales in neighborhoods populated by people older than 40. This was the last generation that regularly bought new music on vinyl, and their kids' stuff is starting to crowd out the things they've been holding on to for years. Make their lack of space your gain.
Shop online. Check the usual Internet auction sites for disks but, just as you would at a garage sale or flea market, remember the nooks and crannies. There are online outlets that specialize in vinyl, and many of the brick-and-mortar record stores across the country maintain an online presence to move their inventory.