I just did the math with current local prices.
Methanol, 1.7 cents an ounce
Nitro 35 cents an ounce
Klotz lube 30 cents an ounce
So 15% nitro with 18% lube will cost me $15.09 to make.
I can buy it tax included for $13.76

I did get a gallon of 15% nitro 18% lube to mix with 2 more gallons of methanol to make 5% nitro and 6% lube for my ST 3000 with a needle bearing converted rod, both ends. Comes out to $6.05 a gallon. It would cost me $6.50 to make.
Guess I'm a buyer and not a brewer.