Hi
Yes I have bought a few. There is a market for them to break for parts too so that is your competition and can affect price. I've only bought auction. I don't think you'll find a way in to buy straight off the insurers, but the recovery companies can sell on their behalf.
There is a seller on ebay called 4th Dimension, greater london way I think heathrow area. They get a reasonable amount of stuff in and out. Only used them once, bike did turn out to have a knackered engine which wasn't identified / noted on the listing, but buyer beware, you take that risk (i've rarely looked at stuff hands on before bidding).
Most of the time I've bought though Hills Actions in Skelmesdale. They sell online with a collection of other recovery / breakers nationally. It does cost now to register and bid but not as much as I think you would find copart or BCA.
