10 dollars American
Damn... That´s heck of a price for that tree!
for the size, it’s like 6’(2m) with a 5”(10.5cm)diameter trunk.
Well, since and adequate proportion would 6:1 or lower (unless you are building a Literati), maybe "chopping" it up to 30 inches height would be a good start. This proportion, though, it is not a fixed ruled but rather an indicative one. So, look at your tree and decide by yourself. Currently as it is, it seems far too tall for the trunk girth.
Also, I believe that currently is having a dreadful soil mix (by your image it seems so). So, please, consider repotting as a viable option for this tree, too.
Alain