That really doesnt sound good on a 55 plate, especially if there is no obvious break to the paint, it would suggest that its possibly had a repair at some point in its life, and if your a perfectionist then it will probably niggle at you every time you clean the car!
Since you can retro fit almost every original feature with these cars, the most important thing to get right is the body work and the mileage/engine condition. Oh and as an after thought make sure the cambelt was chnaged at 4 years 40k etc.