If you can not beat them, feed them. To keep squirrels from your feeder, try to block Birdseed placed on the ground. This all-in-one feasters come in large sizes and holding several pounds of seeds, and nuts in a compressed block. The squirrels will bite off, and (hopefully) let you alone bird feeder.
Create your own
Instructables, a popular way for the site has instructions step-by-step, including pictures, on how to collect your own squirrel proof bird feeders less than $ 10. By attracting light bonding wires as perches, this clever design does not allow for stealing your bird seed squirrel too.
Although this approach takes more time and effort, cost savings and the satisfaction of helping to make your own feeder useful to try to make, especially if you're with friends or children.