I started sorting halves and saw on some site to save "P" mint-marks, So after a $500 box I got a ton of the P's. I looked to the PCGS price guide and find these as well as several of the D mint marks in same time frame are listed at like $11-20 (1971-2003).
Now this can't be right, I checked e-bay and you can find SOME of these for $2 of less. I understand some are likely far less than MS-65 grade but I wonder about the true value of these and how PCGS can make report these high values. I'm new to coins, though in comic book/ baseball cards I remember I might get 1/4 of the list price of any rare cards/comics when selling to a dealer. Even at that this price may not be a bad find. Any advice or comments?
I don't think so. I don't think you really get those prices although you might get close, and you'll lose out on any that don't make the grade. I use NGC for grading, costs $12 per coin + shipping and insurance both ways. If you were to ebay them and get good prices, your profit margin would probably not be worth it even if all 5 turned out ms-65. If only one turned out lower, your profits would evaporate.