Eddie,, you did NOT step on any toes,, it's how new folks learn,,, by asking.
SOme of the info can be a bit confusing,, so it's no big deal to help someone out. Flatgate has given you the breakdown of the correct model info to see.
Now,, to elaborate,, IF the seller has an 80 prefix OM Super,, AND it has a FACTORY brass grip frame,,, it would need a factory verification letter to prove it's rariety. THere are aftermarket brass grip frames,, and then there were sales of brass grip frames direct from Ruger not installed on any gun. So,, they can be added later. The factory brass grip frame will have "MR-3DB" cast in the metal under the stocks. Next,, a call to Ruger records will verify if it was fitted & shipped from the factory with one. Then,, of course the condition & completeness of the package will clarify the price adjustment.
Now,, if it doesn't "letter" but does have a factory made brass grip frame,, it adds usually about $250 to the value of the gun over what a normal Super in it's condition would bring.
The devil is in the details,,,!