A big 10-4 to that one!!!
Most of the paint I buy is left with the customer... ON THEIR WALLS!
I don't know how long it took to accumulate that much, but we didn't have 350 gallons stocked in our warehouse for t/u and matching after we did 260 residential units for one of the big builders with maybe 15 color schemes in the tract. It may have been wise to keep it, for the year's warranty, and mostly damage done by other subs where we got called in after repairs...
70 - 5's is a big chunk of money... and then to pay storage costs for it?
I'm sure floorspace is tight in everyone's shop!
Use it for undercoating before letting it dry out and sending to the landfill.