Told me he'd take £400 an hour ago. He's going to do a condition video tomorrow evening.
For £200 I'd probably go to NI to collect!
If it is undamaged then that is indeed a bargain.
Graftons are fascinating instruments and both he rarity and looks are what makes them collectable, but as mentioned, collectors only want undamaged instruments in original condition (which is partly why we have the stupid concern of relacqering in general)
For players graftons aren't so good, not because of the sound, but because of the squishy pads they came with and the action in genral is not to everyone's liking due to the springing.
One problem with graftons is that once there is a crack, it cannot be mended invisibly so bye bye collector value. A knock that just causes a small fixable dent on a brass horn, would render a Grafton uselss for collectors. You can't even get replica replacement keyguards like I think maybe you can with Conn 28m or Tonking III
So I'd say anything in playable condition but with repaired damage is likely to be worth < $700 IMO. If not playable then I'd say it has maybe $200 max value as a lampstand or wall hanger because the cost of puyting it in playing condition is huge.
But if it is undamaged and with nice originall lacquer, then at least 2000 IMO. I value mine at more than that because it has had the action vastly improved with less squishy pads so much nicer to play, but also does have value to a collector because if they think appropriate I still have the original pads that can go back in to restore to pristine original condition.
Collector vale really depends on what someone might pay and I think it could be very high oif someone really needs one and isn't aware of that cheap one in NI. (If indeed it's undamaged)