If the bluing and woodwork are pristine and you have the fore and rear sights then it's a good price. What is key is whether the Mk1 piston seal is still up to scratch. These old ones - although synthetic- have a tendency to disintegrate. The spring on a 124/127 is long (by anyone's measure) and carries a whole load of pre-load and as such, not recommended for the amateur without a spring compressor. Therefore,, replacing the piston seal and a service re-lube may be the only costs to bare if you don't have the kit and know how. Just a thought. Still a good deal if in pristine order aesthetically.