I volunteer at a charity bike shop. We collect donated bikes, repair/clean them and sell them. The procedes go to the charity. Last year we sold approx 2500 bikes. The bikes range in price from $10 for small kids bikes, to $100+ for bikeshop quality bikes. We get all kinds, age, and condition bikes. The shop borders a low income area, although the people buying the bike come from every economic strata. Some people will buy a bike, and donate extra. Others need the cheapest transportation they can get. The volunteers are mostly bike geeks, and we usually have a good time doing good.
A constant problem is the theft of bikes. Every thing from prying the front door open, to running in and grabing the first bike they can get their hands on has been done. It happens about once a month. Since we don't pay for the bikes, the monetary loss isn't that big of a deal, but you have to be pretty low to steal from a place that is helping kids in your own neighborhood.
I feel for the Bike Kitchen.