Haven't seen it mentioned, but Steam has
Crazy Machines Everything Pack for $23.99 USD. Don't be confused by the Crazy Machines 2 Complete on sale, which is $29.99 USD, but only includes Crazy Machines 2 and its DLC.
I don't know how long the sale is on, but you might want to wait as something is wrong with the transaction. I bought the Everything Pack, but did not receive CM 1.5. Others on the forum say they bought the Everything Pack and did not get CM 1 or 1.5. My receipt is titled "Crazy Machines Complete" but has the price of the Everything Pack.
"You can either want something to be true, or you can want the truth. Pick one." - Mr. Diety