Sorry to say they aren't worth too much.

Yours looks very similar to my mums. I would be inclined to put it back to standard and e-bay your lights seperately and put the car in the paper for £800. We got my mums 58,000 mile grey XR2i for £700 and a huge wedge of service history and receipts down to the last nut and bolt.

The rust around the filler cap is nothing to do with petrol it's moisture that collects between the panel skins and rots it from the inside out. A proper reapir on this involves cutting out the section and welding in a repair panel. Wouldn't expect much change from £300 for this. If you repair it with filler it will only mask the problem and will come back bigger and badder in about 6 months.


Possibly not what you wanted to hear though