They're only cheap really, if you get them direct from Dankung. I ordered a Toucan last week. That was from a vendor here though and it cost £38.
I like the Axe Hunter which is about £17 from Dankung. There's a few nice designs and, being stainless steel, they are pretty much indestructible. I only shoot Chinese tubes with mine. I like how fast they shoot with steel.
They aren't for everyone. I've taken a decent amount of game with mine. I use 1745 tubes. I feed my ferrets on ferals, woodies and pheasants that I shoot.
I'm going to use these tubes for the foreseeable with different types of ammo and see how I get on.
kranky - what do you think of the Toucan now you've had a chance to play around with it