I highly recommend calling Jeff at Moon Valley Nursery (602-367-0218), here is the back-story.
1) We shopped and shopped for trees, looking for the best price, and we felt that Moon Valley was more expensive.
2) I called Jeff to tell him that we wouldn't be buying the trees from him, as Moon Valley was too expensive. He said, "before you buy, make sure you take pictures of both trees and compare them both - you will see we are not overpriced, in fact, we are cheaper when you compare like-sizes."
3) That is exactly what we did, and we were shocked! Moon Valley's 24" box tree was the same size as their competitors 36" box tree! We felt so scammed by these competitors.
4) In the end, we went to Moon Valley and got a set of GREAT trees at a awesome price.
5) After the sale, Jeff offered to come back to our home (for the 2nd time) to help us place the trees for maximum sun shade. That was something he didn't have to do.... the sale was already made.
Do the comparison test before you buy... you'll be shocked too.