A lovely shooting match target pistol, also a milestone in match air pistol shooting, every shooter and collector should have one. Dificult to tell the condition from the picture but the original handbook and test target adds to the value, if its in an unmarked polystyrene box then a bit more, If its good condition as I suspect ask £250, its easily worth it.
Robin
Walther KK500 Alutec expert special - Barnard .223 "wilde" in a Walther KK500 Alutec stock, mmm...tasty!! - Keppeler 6 mmBR with Walther grip and wood! I may be a Walther-phile?