The price is currently as low as it can gets in Amazon for this item.
Here are discussions in the previous deal post: https://www.ozbargain.com.au/node/558061
I have one of these, good little hand grinder, although a little small as it only holds enough for 2 packed porta filters.
I do like that all the parts lock together snugly, so theres no chance of it coming loose and dropping coffee in your backpack/bag like some of the other crappier ones.
I bought it for $8.7, very tedious. Not worth my time grinding away