Years ago there was a couple and a lad who were nicking bikes around our village who were stripping them down and rebuilding mixing up the components, the bikes were then picked up by a guy from Manchester who obviously sold them on further down the line so keep a look out for bike builds similar.
The only problem with that, which the police told us, is once they’ve swapped stuff over unless the frame number is intact and you have it you can’t prove ownership which is why they got off scot free.
Plus when the house got raided any bits they had left they chucked over the back fence into a field so it was no longer on their property, absolute joke!