What is there to appraise? A site can be appraised, a name can be valued.
You parked it. There are no old links to be easily found. It is an "easy to remember" name, but it is not easy to see how it could be monetised.
Somebody might buy it because it is cute, and easy to remember. Not going to pick up type in traffic.
If it picks up $1 a week on the parking revenue, I will be surprised.
If you can find an angel to buy it, you might get £50. Otherwise it is probably worth about £10 + £10 transfer fee + £10 for the remaining registration time = £30 tops.
Now, if you had cloud9.co.uk, that might be interesting.