It sounds like he has a lot going for him and actually some of the cons you listed - such as spookiness and 'snortiness' - aren't things that will bother the kind of rider you should be advertising to. As Laceyfreckle said, you can leave that out and maybe tell people once they're interested - just be aware of what is 'too much information.' If it isn't a problem, it doesn't need to be mentioned, so if it is mentioned it would make me more inclined to think of it as a problem.
He seems like a nice, allround pony for a small adult or teenager interested in general pony/riding club activities. Really, this is one of the better markets to be in at the moment. The only thing to really worry about in terms of selling points is sweet itch.
For today's market and what you're aiming for, £2950 is too much. I'm not sure what area you're in but I would say the top price you could advertise at is £2500 although it depends how quickly you want/need him sold. You're only just coming up to the right kind of time to sell in April but unless you're selling an already-established high-performance horse it is difficult going at the moment.
What is the absolute bottom line you'd be willing to let him go for?
Also have you tried calling local hunts, pony/riding clubs etc and asking around? Speaking to your local tack shops are also good as they will know people in the area who are looking. Reputable dealers get people ringing and asking them for horses all the time and some will work out a commission-based deal with you to help sell your horse.