Can't see many people up for putting that back together. My guess is they're bidding in the hope the engine internals can be used, or hoping the numbers are going to help get another one back on the road.
Doubt it was nicked, my old grandad used to bury anything rather than have to pay anything to tip stuff! And people in t'north of England have a reputation for being a bit frugal! (Now I'm in trouble!)