With the usual caveats about swallows and summers, a 30 bone-buttoned metal ended Crabb just sold for a hammer price of £2,400 at an auction in England. With buyers premium and VAT, that gets you to £2,832 and a modest amount of refurbishment and tuning gives you a ready to play price of close to £3,500.
Since the 39 key Jeffries in Ireland (mentioned in another thread) failed to sell on ebay at £3,896, that could indicate a very good price for the Crabb, a narrowing of the gap between Crabb and Jeffries, or that either one of them is an anomaly.
I hope the buyer knew what he or she was getting and that teh Crabb turns out to be a good one!
Alex West