If you have a "Northern Tool" store near you, you can get one much cheaper. In their ad last Sunday, they advertise one capable of 600 pounds for $15 or $20, I can't recall exactly!
If you go to
http://www.northerntool.com and search for "hand truck", I believe it was the second one in the list which they show as being $25 online. The first one for $20 that converts into a flat cart is also interesting.
Quality might not be great, but for occasional use, I think it would hold up.
They have 44 stores in 10 states, check for one near you:
http://www.northernstores.com/Good luck,
Dave