Citroen c3 sx spares or repairs in Withington, Gloucestershire for sale

I am selling a 2003 Citroen C3 SX 1.4 with 3 previous owners log book and partial service history FOR SPARES AND REPAIRS. It was recently bought as second hand and has since been diagnosed with a dodgy head gasket. We have been quoted £800 to fix which is too much for us. The car still starts and runs but there are some other minor issues, 1 of the wing mirrors is broken but the electrics still work in it and there is a slight oil leak, also the previous owner had spilt some white paint in the rear footwell but this is just a cosmetic issue. Just trying to be as honest as possible. Would prefer cash so please contact me on 8 if you are interested or have any questions. *amendment* the car also has a black box installed. Forgot to mention, sorry.