Greg, I'm pretty sure you could put in a "practice" order to see what shipping costs.
I found the shipping to be quite inexpensive but it does skyrocket once the pots exceed the 10 gallon size.
They are very sturdy pots that will last many years; I also like that they have a wide bottom which makes them more stable when it's windy.
Oh by the way, as everyone probably knows, but I'll mention anyway, those nursery manufacturers live in some parallel universe, where the capacity of a 7 gallon pot is actually 5.6 gallons, etc.