Bradley...to going price at a discount is about 175.00...I have one and love it... the 2 cheapest are..... Hitachi SP18VA(H) 7” Disc Sander/Polisher, 11AMP, EVS, 0-3400 RPM with Hook and Loop Pad Hitachi SP18VA 7" Polisher & Light Sander 175.00 at ace tool 169.00 at coastal....thats where I got mine 2 years ago.....great tool AL
Bradley ,there is a rotary for sale with 8"pads but I don't know if it's a Hitachi or nor ,it's worth finding out,here is the link: Rotary Buffer for Sale - DetailCity.org - Auto Detailing Forum
Bradley keep a look out on Ebay. You can find them there in almost new condition for about $100 + shipping usually. I have seen some auctions go for a lot less as well. They are not on there in abundance but if you keep your eyes out usually one or two pop up and at a good deal.
I bought my first NEW hitachi for $140 shipped. Ill have to see where it was from. I got my second one for less used