I have many Ruger revolvers most of them blued. They are tough and reliable. Withvery little time and trigger work they can also be very excellent shooters and very accurate. If it's a good price like you say I would jump all over it! You will not be disappointed. With the exception of the New Vaquero, the Ruger revolvers will digest even the hardest hitting+P ammo you can put through it with absolutely no problems. This includes the original Vaquero (Pre 2005 large frame) , all the New Model Blackhawks (including the Super Blackhawk) and the Redhawk line including the Super Redhawk.

I'd buy it and shoot the hell out of it, don't worry about the bluing, just oil it and keep it clean. I use G-96 gun cleaner and lubricant on all of my firearms for years now with excellent results. Good luck with your purchase!