It's a fair retail price for the Ruger @ $450, and the cylinder LNIB @ $ 200. It all depends on what one considers "excellent condition".
I sold a R&D .45 Colt cylinder LNIB, fitted for the Uberti Remington last Sunday at the gun show for $200, and bought five repro C & B revolvers, including a Dragoon, two 1860's and two 2nd Gen Colts with factory boxes.
From a retail standpoint in today's market, a Mint Ruger Old Army is a safe buy at $450.
I am looking to buy four ROA's from a fellow in the gun club as soon as I finish paying property taxes this month.