^not seen that nonsense before for pity's sake no!
C4 OGS car is owned by a charming Italien chap with plenty of interesting cars. I heard from Marco that he's going on the Aero Massignac trip so will find out since could not resist. Last year he loved it and specifically wanted a S1 so doubt it.
Pricewise i think Simon is spot on. I would let my S1 go for the right price and if i lost my garage but what to replace it with? I've driven the S4 and prefer the S1.