Just wondering. You say it is basically untouched, and it generates a fair amount of revenue by itself. Why would you sell it? Why not just let is be and get the income?
Presumably because the buyer was offering a high enough multiple of the annual revenue to be tempting.
I'm sure the seller would decline $6,000 and accept $600,000. The buyer would be looking to find a point in between that both buyer and seller were happy with.