Coyote
I hope you come back on and explain what a 10 year old stand of pine looks like. In my best expectation, there isn't anything there to "sell" (at best Christmas trees, but if not shaped for that over the lst 4-6 years, not even that).
I suspect 'spending' money is the way this will happen. If me, I would consider cutting, pushing into a burn pile(or chipping), and then letting the stumps rot which would add a few more years. This would be the cheapest. Might chip the tops to get 'some' saleable chips for landscaping, but they aren't going to last long on the ground, if pine.
Hope to hear from you.