@nyrath consider what is being salvaged from the wreck and what it's being used for. If its usable components, you need a shipyard nearby(flux capacitors don't do a logging town much good). If it's a commodity that can be used locally, how quickly does the market saturate. (After the first hundred tonnes, steel plating is less valuable. ) Does the salvage spoil. (Frozen meat pies, oh yes, novelty Garfield clocks, not so much.) How often do wrecks happen? Once? Or pretty often?