Well, waiting has finally paid off!
I manage to order myself a pre-owned UltraAct Ultra-Seven off of Amiami for around 2980 yen, which is around $36 USD, which is a pretty sweet deal compared to the price for this item elsewhere. I expect it'll be in decent shape when its delivered. We'll see. This is definitely one item that I have been hunting for for a while. Just happy enough to get it at a fair price.
Now all I need is the Ultra-Act Eleking to go with him!