ORIGINAL: fredscz
Unless you have to have a new one why not check into any swap meets that might be happening in your area. Trainers can sometimes be had for next to nothing and I have seen complete setups for $100-$125.
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This is actually a very good idea.. Wish I thought of it..
Along this vein.. Ask around your flying field. More often than not somebody has an old trainer he'd be willing to sell, or knows somebody who might. Some flying fields will have a Post Board, that'll have advertisements for "stuff for sale". And the LHS could have something similar...