That's not too bad. A used Corny costs about $35.00 here in MI at the LHBS. Check the shipping to your pad and see what the unit cost is. If it's near $30.00ish, that's pretty average.
Yeah, the shipping is high, IMO. I can get them for ~$26.00 from my LHBS. Check Craig's List from time to time. Got my first three for $20.00/ea. from a guy posting there. Bought from Jason, too and been pleased. But he is out of kegs until Fall. I'll be looking for more kegs about that time of year, so that works for me.