I picked up a very clean and boxed 280k about twelve months ago and have been very impressed with it. It's very pointable and accurate. Being carbine and .177 discharge is a little harsher than I would like but I've left it as I got it. I'm sure it can be improved though. Trigger is particularly good.
If the 240 has the T06 trigger I'd imagine it's a cracker but as said here it may be a better investment to upgrade to the 280 and have hunting power.
That said I recall McCoy's discounting the 240 down to £105 at one time. Not a king's ransom in anyone's books...
Dave