Definately stolen. No way would they give the bass away for that much. The guitarist in my band used to work at a Cash Convertery type place and some chavs came in with a 1972 (or 1973 - can't remember) Fender Precision bass! The chavs not realising how much the bass was sold it to my guitarist for £50! My guitarist bought the bass from the shop, went to a music shop, sold it for a much higher price and then bought new guitar gear!