You definitely will not find it cheaply online. Shipping will be extreme, probably more than the cost of the blocks themselves.

I get Harlan 2018 at a local reptile/animal show, $13 for 33 lbs.
Local feed store sells LabDiet 5L42 20% protien , $23 for 50 lbs.

Buying from a feeder breeder at a reptile show or getting it from a local feed store will probably be your best price. Any Purina dealer should be able to order Mazuri 6F lab block for around $20 per 50 lbs.

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