I got stitched up once with a clocked astra, before mot online records.
Seemed decent at the time and it was cheap.
But no history and one key only.
I took a gamble and i knew i was doing so.
3 months later the turbo went and the car was constantly going into limp mode.
I sold it to a guy who claimed he could fix it and i lost a grand.
A couple of days later the guy wanted the money back because apparently there was more problems.
I told him i sold it as seen and he knew about the limp mode, in fact he saw it himself on the test drive.
Then even worse, a couple of weeks later he called and said the car had been clocked.
From the photocopy of my v5c he had contacted the previous owner to ask for history and they sent him all previous mot.
Car had been clocked by the "dealer" by 100k miles.
Fortunately I was unaware of that and the car had been clocked before i bought it.
The guy took the dealer to court, got a ccj against him, but as it happens the dealer closed the limited company he was operating and opened another one, same premises, same director, different company name.
Thief!