Offer them on Craig's list.
drill holes and then pour epsom salt into the holes then pour water into the holes.
Rent a rolloff container and have them haul it to a tree/brush dump.
That's high and might reflect tipping fees at a landfill.That looks like the winner. Unfortunately $700 for a 40 yard container.
A carbide chain or two or even a couple loops that are on their last bit of teeth quartered and burned in an outdoor fire pit - if those are legal in your areaThese stumps are huge. From 60' pine trees. Town doesn't allow stump burning.