What's it worth

[Brendanmck]

I've been made an offer for my m3 gt individual but I've no idea what it's worth. I've owned it 10 years and never used it it has the same 81000 miles on it starts first time and drives but boy it needs work. Rust has raised its ugly head in all the usual places the brakes need freeing up and the exhaust is blowing rear spoiler has weathered badly and needs replaced so what do I ask for this. Any body on here fancy a restoration project I'm open to all offers thanks.