Perkin Guns currently have a nice condition unboxed one for £130 (http://perkinguns.co.uk/nvn-22/) and a boxed one with literature for £215 ( http://perkinguns.co.uk/nvn-22/), which are not bad prices for a dealer. There is the usual problem of delivery of course, if you do not live in the vicinity (Staverton Northants.), and they charge an extra £30 to send to your local rfd.