Getting back into agility?

Last summer, I did some agility with my sheltie. Not very much, just a ring of jumps he would do. They were mostly 2-by-4s propped up on cinder blocks, not real jumps. I want to get into it for real this time, so where can I get cheap but good equipment, and what are some good training methods? I'm gradually increasing our walking distance to make him more fit, I may start jogging with him soon, too. Is there anything else I should do to prepare him for agility?