The Ann Arbor Reuse Center, run by Recycle Ann Arbor, is located at 2420 S. Industrial in ann Arbor.
It serves a unique niche in the Ann Arbor ecosystem - it takes stuff that is not quite cool enough for tag or garage sales in, and sells these items to people on the lookout for bargains.
It is entirely hit or miss, with good pieces going quickly, and ugly items lingering forever. Need used crutches- they got 'em.
The building materials section is particularly good, with a wide variety of windows, doors and tiles to cut the costs of your renovations.