The RV transport company I've pulled for would be in the neighborhood of $2500 to Windsor Ontario, figuring 1000 miles. Some may do it a little cheaper but the RV transport industry is busy right now restocking dealer lots.
Are you looking for a legitimate hauler or just any good ol boy that'll help out?
It's not always that easy. People want what they want. I picked up a used Arctic Fox TT last year in Phoenix with a delivery to northern Georgia. I picked up a new Montana 5er in central Minnesota last summer and delivered it down around Dallas. I think they were both in the 1200-1300 mile range. It happens all the time. The RV transport industry lives mostly off of delivering new RVs to the dealers but long haul deliveries of new and used campers are very common as well. As a hauler, you just hope when you pick up a used one that it's at least halfway roadworthy. A new set of tires is always a plus.
I thought I would ask on this forum first. I'd rather put some money in another members pocket if the job can be done for a reasonable price, and safely done. We searched for a used 5er in Canada for several months. The unit we bought was a fairly high end trailer. We did find only 2 of this model in Canada for sale. The pricing was out to lunch though. Even with our lousy dollar. The pricing was much better from the dealer in Georgia. We saved over $30,000.00 buying it in your great country. Getting it home is NOT a hassle. I'm actually going to get it myself. But who knows when the borders will open. So, that's why we thought about having it hauled to the border.