I hold two big cherry trees surrounded by my rear legs patio and i want to put on the market them. who do i own to contact?
Answers: By big I'm not sure how big you mean.
If you want to sell them as nice trees to someone you may inevitability to wait until they go dormant consequently have someone come by and dig them out. Craigslist is great for these kind of things.
If they are really big and you mean to sell them for their prized lumber, contact local lumber places or arborists to see if they know someone who would be interested contained by buying them.