When I lived in CT, PT shipped my order and they did not charge sales tax on my order.
When I lived in MD and bought LMB/Blade, they shipped my stuff to Clumber's house with his order at my request (who lives in VA), and they did not charge me sales tax on my order.
So you shouldn't get charged sales tax unless AZ has some strange laws. Of course, you are expected to pay sales tax voluntarily to the state you are living in at the time you make the purchase, out of the goodness of your heart....
To reinforce what MR said: shipping on individual implements is outrageous. I paid $650 for shipping to CT for an order similar to yours. Buying just the blade/LMB would have cost me something like $460 in shipping half that distance for the $500 blade and $450 LMB together.... Which is why I tailgated on Clumbers order.
Buy it now if you think you will want it later (and of course, you will...)
Thanks Tim. I appreciate the info on the sales tax. Maybe Chris thought I was in Va at the time we talked.
The wife and I have talked this over pretty good and we don't really see a need for other attachments, considering the cost vs usage we would get out of them. Hope we're right, cause I doubt there be a chance to piggy back on someone else's order later.