Around $100/gallon if you wait for the spring sales, and $10 rebate brings it under $100. Been using for about 8 years -- equal in effectiveness to Interlux multi-season ablatives such as Micron Extra or Micron CSC. I'm in a very high fouling area (nitrogen rich and polluted/turbid western LIS). If I launch in May I have some light slime by July 1, then I wipe it once a month. Never any hard growth. Also because it's water based it's ideal for use on a RIB.