That doesn't tell us what's out there - only that you only looked at cars on coilies!!I didn't look at a single car that wasn't on Coilovers.
Of the 9 on PH today (all under £12K plus one at £23K

Given that PH is basically where enthusiasts are selling their cars, and given that the contention is that being off DRC is a selling point, I would be surprised if all 6 which don't specify are all on coilies.
My guess is that it may now be up to 67% on coilies as most of these cars are now in the hands of "enthusiasts" rather than folks who owned them from new(ish) with a view on value preservation etc.
Dave