it truly completely depends on the handgun.
there have been several posts on here that have been "yeah it sucks, ruger couldnt fix my redhawk/blackhawk but were happy to sell me a new at cost for a total of 400 bucks".
those are guns with a 9-1000 msrp via manufacturers website.
now if there is a mere 10% markup... it should cost ruger about 850 dollars to make a single blackhawk or redhawk revolver. with a profit margin of under 50 dollars per handgun, they would not have survived the clinton administration.