The only place that occasionally has HMs here also charges a lot for them. For Dmitri, my black 'dragon' HM, I paid $23. I spent all my food money on him, so I lived off of carrots, cheese, and cereal bars for a week. xD
He was the betta of my dreams, though if I knew how sickly he was I probably wouldn't have spent the money.
My DT was labeled as a 'panda HM'. I tried to tell him it was a marbeled DT, to get a discount, but I chickened out...