Yes it is worth it, nice piece of kit and the 5 Valve engine is said to be one of the best in the range pre-injectors. With a bit of TLC, a new saddle and some powder coating on the engine and wheels, it will be a good catch. Bear in mind he's only done 27000 miles in 15 years that is 1800 a year average. Probably runs like new.

Ask if possible to view / test ride first

good luck