I have both bought and sold A LOT of tools at garage sales, flea Mkts, etc. If you sell any power tools, make sure that you have a way to plug them in so people can test them out. Hobby tools would certantly weigh less, and take up less space in your vehicle. Some people seem to do well with the " china" tools, but I usually stay away from them ( I will occasionally buy at hhsrbor freight , though, you can't beat their return policy)
Hope that helps...
Les