If it wouldn’t be for the headsketches, this would be the best thing I got from him!^^
And, turns out this is also the colored version of a picture he drew in celebration of the MLP: FiM comics hitting stores for the first time on November 28th 2012, which makes it all the more valuable:
http://andypriceart.deviantart.com/art/Derpy-the-wonder-pony-340168444