@Coinery
At first blush, it may appear unrealistic. However, it really depends on how you go about collecting, what you collect or even might consider collecting. Most collectors can and should develop a numismatic point of reference based on experiences… which include the coins seen, the state of preservation, and how often they are offered for sale in the condition desired. Frankly, the best coins I own are the ones I really was not actively seeking at the time I decided to buy them. This really turns into recognizing opportunities but not everyone wants to buy a straw hat in January.