I will read up on the Victor UA-7045. What vintage is typically available and are they all the same?
You have to look for UA-7045 or 7082 index only.
make sure to check side image or the armwand and counterweight in the extreme position on the end. If the counterweight is in line with the armwand then you’re fine (on the bad samples the counterweight is bent down). And if everything else is fine then it’s a nice tonearm. And believe me they are underrated, it’s reflected in the price, which is amazing for the buyers who knows what it is and how good it is. Highly competitive with much more expensive tonearms! Only the rubber in this tube that supported counterweight is a weak part, but i’ve owned 2 perfect samles without this problem. Tonearm is easy to use and it’s easy to swap and adjust cartridges on it (VTA on the fly etc). Not every tonearm will give you this feelings, and only for $750 max. It’s a bargain!
7082 is long version, rare and normally overpriced a bit (compared to 7045) when it turns up for sale. No difference, just slightly higher effective mass and length.
For both models there is an additional small counterweight to screw in on the back for heavier carts. I've never used this option, but it's good to have it if the shell and cart is on the heavy side.