I'm happy to buy the properly assured stuff online within reason and did so before Lockdown but the older, higher mileage stuff with no report or the dreadful "essentials" from Aston Barclay or BCA you have to be incredibly careful on.
It is the lack of consistency which annoys me - random cars will have full checks and others none.
I find the proper Manheim Silver/Gold check pretty good but the others are very iffy.