I just got a good tip on another forum. You can get the same basic coco mix for quite a lot cheaper. There are different people selling it under their brand name, and this one is a great price.
Cococoir plant mix. I found it on a website for $7.58, same size as Reptichip. They make 3 different kinds...just the bark, just the chips, or the "mix" which is like Reptichip.
The site I looked at comes out about $12 shipped per block, if you buy 3 blocks. If you buy less blocks or more, the price changes slightly, because of the shipping. But its less then half price of Reptichip.
I'm not going to link to it directly, because I don't think that is allowed. But a web search should bring it up, or you can pm me ...