At this vast repository for used household items of every stripe, donations are always welcome. When old knees give out, the old bikes come in -- hundreds of 'em, fit for man, woman, and child. If you aren't in the mood to spend a small fortune on a new bike with fancy front suspension and an ergonomically correct seat -- after all, you just want something to tool around town on -- go used. Faith Farm, which takes up about two city blocks, boasts the biggest pre-owned assortment of ten-speeds, mountain bikes, fat-tire beach cruisers, Italian road bikes, and more. The pickin's are anything but slim, Jim, and you'll rarely (if ever) have to spend more than $80 or $90 to set yourself up. Just leave those black stretchy Lycra butt-pants at home. You look stupid in 'em.