The auction car should be in the range of £25k to £30k depending upon the knowledge of the buyer and the keeness of the seller to do a deal.
13CUX or "Flapper" injection suffers from limitations of a newly introduced technology , most of which were ironed out in the follow up 14CUX "Hotwire"
The bodywork and interior look OK to me , but with that obvious neglect under the bonnet , I would fear the worst when it comes to chassis, valences , steering, suspension and brakes.
George , your car is something very special , obviously it has had a lot of very detailed attention in all the right areas, and still maintains most of that today. I would estimate £35k , or at least a £10k premium over the auction car.
That said +8s just aren't making the money they should be these days. Newer owners seem to prefer the Roadster if they want a tourer , or the more agile +4 or 4/4 for spirited driving. I think the iconic status , the V8 soundtrack, and that indefinable desirability factor should put them at much higher prices than they seem to make.
