M5 owner devastated

[Sadface]

Havung bought my E60 m5 from knights almost 3 years to the day and finally about to pay for it outright,I'm now in a position to sell for a couple of reasons,I've only covered 17k in the 3 years which has to be fair kept them big service bills at bay but in the next 12 months of ownership I'm looking at 6k conservative estimate in rainy day money which I'm struggling to justify despite having the rolling monthly extended BMW warranty which costs £90 a month but I wouldn't recommend ownership without IMHO , what did shock me was , I paid 21k for the car 3 years ago and looking around the forecourts nothing like this exists for the money anymore,I have been offered 12k at the dealers px,but only having a budget of 28k including px and a little finance I'm looking at best M135i or a rep mobile