I've a friend selling one at that price, same age. Its been used in winter, is a good runner, but not very tidy! Between £1000 - £1200 sounds reasonable, unless exceptional condition and very low miles....
Sure fazers will become a modern classic in a few years, price might go up! Seen year 2000 bikes in dealerships for 2000 quid, but then most stuff in the northeast of england is more expensive than else where for some reason!