Where to buy C&Rs

Hey guys, new to restorations, and newish to purchasing milsurps. Most of my previous purchases have been through J&G sales, and RTI. I’m looking for affordable C grade, or B grade rifles that i can bring back to life, and eventually shoot. I like RTIs pricing around $100-$250 for C and B grades, but there’s a stigma about RTIs descriptions and what actually shows up. It just seems like RTI is the only site selling beat up milsurps that i can make a project out of. Any help is appreciated!