They're good guns and it's worth it new. Are you planning on hunting with it? Going to shoot double action much? If you're going to shoot much double action I'd suggest the regular Redhawk. If you're mostly going to shoot single action (range/hunting) the Super Redhawk is better. The reason for this is the lockwork on the Redhawk (think Security Six) different than the lockwork on the Super Redhawk (Think GP100).
I have that Ruger and I love it. I take it big game hunting for deer and Black bear.
I paid a bit less than 700 for mine. I would shop around and consider using the savings to get a good start on a nice hand gun scope!
A Super Redhawk with a 7 1/2 inch barrel (in VG condition) and 2X Leopold scope just hit one of the local GA forums for an asking price of $650. Jeebus these things are big - and no, I don't need a cannon like this...
Great for deer,bear and hog hunting and silhoette shooting. If you're 6' 6" you might be able to holster it without too much of a problem but for me, being 5'11" 165 lbs., it might be like holstering a row boat oar. That being said, I'd own it.