It sounds like a problem that any gunsmith could easily fix. I don't know what the added "V" is all about, maybe added by the South American security company who used it?
Could be the hand(pawl) is hanging up on the ratchet teeth. Taurus isn't the best at fitting ratchet teeth, one of my 82's has issues with this. Could also be the forcing cone is too tight.
If Taurus could get past their bugaboo with the extra "V" on the serial number, I would take the new 82 for an extra $100 in a heartbeat. Given the fact that you probably paid $150-200 for the trade-in 82, that still puts you below retail for a NIB 82 that will probably actually work. Make sure there's no hidden shipping fees, like Taurus also asks for $80 to overnight ship to your FFL. In which case, it's not worth it.
I like Taurus guns, to an extent but there's a reason my Ruger revolvers are my "go to" guns. I have never had a Ruger bind up on me. One of my 82's develops a rougher DA pull as the gun heats up from shooting, if you believe that. I have run literally 1,000 rounds through a Ruger Service Six during one range trip with 0 issues, I do not know if one of my Taurus 82's could do the same.
None of my 4 Taurus revolvers functions perfectly, and I had to tweak all of them to make them good guns. I am only at the point now where I am able to enjoy shooting my two 82's, after a little bit of work on them. I would get one of the 82 trade-ins only if I could get a hands on with it first, and that's only because I collect PD and security trade in revolvers and these are a neat variation.