You won't - it must have been 15 years old but it was so little used that the paintwork was pristine and the tyres still had the whiskers on them. It had been over-oiled, which had protected it and once I had removed all the commuting paraphernalia and cleaned it I found a gleaming bike underneath. I sold it two years later for the same price.
BTW it was a Peugeot Sport 3000, in metallic red. Quite nice looking but old-fashioned. It did the job and is now in the possession of a happy bloke in Cockermouth who loves it.