I was looking to buy a year ago and searched the internet for available models in .22 (ie FWB 127), which should be similar in price to the .177. Over several months of occasional searching, I found prices were anything from nearly £400 to £450 and, from recollection, these were offered by gunsmiths. A private bargain might probably yield a better price but very few of these seem to come up.

I considered this somewhat expensive so shelved the search but would be interested at the prices your colleagues, here, have ventured.

Kind regards
Andrew.