If a reputed proof fired only Savage (the least sought after in UK by a collector) is £1k then a similar condition Maltby (quite high sought after by collectors) has to min £1.5k, surely?
(I do agree with the other poster that the unknown FNR stamped stock could be a turn off to a serious collector)
And the few mint 'less telescope' 4T's I've seen have been way over £2k........and a collector won't be going anywhere near a £3.5k 4T, which at that price range that I've looked at are all mongrels or faked.