Good price but the spares are now like rocking horse shit. Hard to get parts for when things go wrong. Save a bit more dosh and go for a new S200, or wait for a 2nd hand one to come around for similar money. It's lighter than the 300 series and your lad will be much happier carrying it round.
Alec. Any talk of tuning guns up on the forum will have your posts pulled. If you want to deal in FAC air rifles do it through the legal channels.