Found a 1957 Custom Royale Sedan. near show. what should i look out for?

You didn't say if it was 2Dr or more door?? Makes a difference in pricing.

1957 DODGE CUSTOM ROYAL LANCER D500 2-DOOR COUPE — Daniel Schmitt & Company

File:1957 Dodge Custom Royal 4-Door Sedan.JPG - Wikipedia

Treblig