Set a deal up with the sap buyer before you have a tank full. Agree on a price.
I got in a bind before I got my RO, and had to sell sap one year. I delivered 1150 gal of sap over a period of 4 days to the sugarhouse that bought it while we boiled 18-22 hrs a day to catch up.
That year I sold sap I originally took a check for the sap, but then reconsidered. I asked if I could get some of the syrup made and return the check. He agreed and I ended up with a 30 gal barrel of the syrup and had to pay for 16 gal of that. My syrup had made 28 gal, and I got 14 of it plus I paid for the rest at bulk price.
After I had my RO for 1 season I started doing sap on shares for 4 other producers.
Dave Klish, I recently ordered a 2x6 wood fired evaporator from A&A Sheet Metal which I will be converting to oil fired
Now have solar, 2x6 finish pan, 5 bank 7x7 filter press, large water jacketed bottler, and tankless water heater.
Recently bought another Gingerich RO, this one was a 125, but a second membrane was added thus is a 250, like I had.
After running a 2x3, a 2x6, 3x8 tapping from 79 taps up to 1320 all woodfired, now I'm going to a 2x6 oil fired and a 200-425 taps.