I would definitely want to buy one
I agree that 25-30 would be a fair price (now let's just hope shipping doesn't get too expensive).
I really admire your artwork and I would love to see a bit of your thought process in your sketches. I would also love to see some wolf sketches in there, but that's partly because I'm beginning to draw wolves/werewolves as well
Anyways, as long as it's good quality and a reasonable price, I would most definitely buy it