It’s been on the bike for 3 years. For trail riding I may only go over the limit a handful of times but it’s there when you need it ie I might need to pedal hard to clear a gap and it’s not good when the speed limit kicks in !
As an ex mxer I would recommend a Spesh kenevo comp £5000 and and do the following modifications ;
Fox/zeb 29 180mm fork £800+.
Hope 29 front wheel just over £200.
29 front tyre £50
Renthal bar and stem combo to suit as the spesh bars are too flat for me plus Renthal are rad £150...
You could meet the seller at a bike shop and get them to do a quick health check for a small fee rather like taking a mechanic when buying a used car .
I would also ask the seller “ if the motor goes pop can they use their after warranty discount , upto a year maybe !
BUT to be honest , if I was...