The eight inch version was the most widely produced. Examples in excellent condition will sell around 500, give or take a C note. Six and a half editions weren't produced in as high numbers. The 65 is however a very popular size and will garner more money at sale. So few drums have been sold, estimating value on a given day or auction is impossible. This size has sold routinely between 350 and a grand. I have seen perfect on the bottom end and beat up on the top end.
The five inch drum however, rarely comes up for sale. I missed a perfect drum last year for 250.00 because the dumbass refused to ship to me. I even offered two bills for his time. So it sold, and sold on ebay at 1499 or something obscene like that. I did finally land one of my own for just under five hundred. But the auction was poorly written (in my favor) saying the drum had all of these issues and wasn't ver good conditionwise and had blah and blah wrong.
I am the proud owner of a five inch SuperTen that was played, and very much enjoyed by its previous owners. it has road wear, it is not an out of the box pristine drum. But....... it says, respect me or yer eyes are gonna bleed.