How much would a 3-band custom made Mike Pope preamp resale for if in mint condition? The model I'm looking at is a 3-band with switchable EQ, passive-style tone, bypass switch, master volume and blend. All wired up and ready to go. I believe this model costs about $475 new, so at 70% (30% off new price) I get $330. Is this a fair price for a used Pope preamp?