I think the most I ever spent was a KKM barrel for my Glock model 40 10mm. That was just because I like to cast and shoot my own bullets. That wasn't too bad though, it was under $200 shipped, worth it in my opinion.

Now my contenders are a different story. I have 2 frames and 3 barrels wearing leupold scopes and mounts. That starts adding up fast.

As for all the revolvers they usually just get Hogue grips to shoot with and that's it