MAXXIS - Larsen TT Wire Bead @ Cell Bikes $14.99
If your needing more than one of these or you have a bit of cycle gear you need to pick up this is a very good price on a maxxis tyre.
I've used maxxis for motocross and supermoto and rate them - havent used them on a mountain bike but figure they're be on par with conti's at half the price.
If your just needing one tyre then the postage rates from Cell are pretty hefty @ $12.95 which is why I reckon you'd want to be getting other stuff there as well - or at least more than one tyre.
Selling elsewhere for $30 upwards.