Hi the-radman yes back to the standard Exhaust, and suspension bushes (had the original wishbones so changed back) Left the Mountune springs it just looks much better.
No one wanted to pay good money with mods, several people offering 3/4k lower because of mods (and still wanted all the original parts!)
May go up in value in a few years but like you say servicing etc and insurance eat into any increase.
All mods removed will be for sale shortly, like you say £2k plus there.