As far as coins and currency go I kind of believe that to be true. Rare cards are a different matter. If it is something that is close to impossible to find then I guess you have to pull the trigger no matter where it is on.
Penny Super Collector in the making! Looking for anything I don't have of him! Just starting a PC of Giannis Antetokounmpo and Nicolas Batum so very interested in pickups of them also!