Bought my Cup for less than £1500 a few years back as wanted a budget track/2nd car.
Upgraded to the 172 turbo in 2017, cost £3000, sold Cup for £1,400, fitted pile of acquired parts to turbo and now have a very good spec for around 5k.
Recently considered selling and going for something more grown up but got scared of potential big bills.
Haven't you tried selling yours for ages???