I built this towtruck http://www.flickr.com/photos/42922809@N03/8710040530/ and my father-in-law really liked it (because this was based off one of his trucks I guess :)) so I built him one. Then one of the AA boss guys saw it and wanted one too, so I will order the parts and build another for him. I never actually set out to build and sell them but it just has worked that way. As far as pricing is concerned I will charge for parts then add about 30%. I really don't know if that is enough but this was my first experience with this and I really have no idea what people charge for commissioned projects so I would also be interested to know.