I have a few nests that I collected over the years, including one that the old owners of my house killed, cut the branch it was on, and left in the barn. It is probably bigger than a basketball. I never had any idea that they were worth that much, or that anyone would want to buy one. Yours is a huge one, very cool except for the fact that it is probably full of hornets or yellow jackets. It would have ruined my day if I turned on that lawn mower, good thing you noticed the nest, I stepped on a couple ground nests this year (not fun at all).