I can't think of a worse venue to market a specialty replica/continuation type car. You are offering to a "bottom feeder" type buyer, the guy who came for a Chevelle SS396 and says "hey, I have $XXXXXX left in my pocket, maybe I'll pick up a toy"
Typically replica/continuation cars that are NOT 427 Cobras with some sort of "Carroll Shelby" connection, no matter how tenuous/thin/bogus, don't do well at the Arizona auctions. The auction companies often over describe the cars and likely scare off some buyers.
Now outside the auction it is different. Hillbank displays in the lot and sells a bunch of cars for well more than they would go for on the block. Go figure..................
These auctions are a great place to pick up a street rod at a huge discount or a muscle car restoration at 50% off the cost of restoration. Having owned a restoration shop I cringe when I see a car with a $75K resto bill sell for $60K. You effectively got the car free only paying the restoration.