None that I dealt with personally.
I used to work at a "garden center", and the boss bought trees from Canada for our higher priced trees. He used native trees from our own field for the trees under $20.00.
Do a Google search "christmas tree canada". That should get you started.
I have access to three farms and am looking to put some deals together last year I was looking at $25 per tree but shipping is going to be more expensive this year. but willing to try to work with people to try and fill a truck with a couple of stops to lessen the expense
Musser's Forests in Indiana, Pa. sells a ton and many would be under $30 depending on size and type of tree. Scotch, Whites and Blues should be in that price range. Frasers, Douglas and Concolors may be around $30.
There's also a pLace in Watertown, NY that sells them pretty cheap but I don't remember the name.