[Arran]

I depends on what shape they are in, a lot of parts missing, major parts missing, rust, or a dilapidated cabinet you may want to go significantly lower or even pass on them. If they are in average shape, all there but needing a refinish then $75 would be at the top end but still not bad if you are planning on keeping them, more so with the Coronado as opposed to the RCA. 1938-39 12 tube RCAs are more common then big Coronados and the 1938-39s suffer from plastic trim problems sometimes and rubber wire. I work on the ALASP principle, As Little As Possible when it comes to project radios.
Regards
Arran