These are some of the people and sites The Christopher Collection has found interesting and informative.
Q. David Bowers
If The Christopher Collection had a man crush it would be on Q. David Bowers. A prolific author and expert on all things numismatic he is the go to person on everything from why early San Francisco Mint pennies have a wood grain to the backstory on the greatest numismatic collections ever assembled. Check out his books on Amazon or the numerous videos on YouTube.
Michael is a college professor who also writes an online auction blog for CoinWorld. He has great insights on the pitfalls and scams prevalent in some auctions as well as useful tips on bidding.
A colorful English YouTuber The Christopher Collection enjoys watching. Numi as he calls himself is a stacker turned collector with a singular love for gold sovereigns. He sends raw coins from around the world for grading sharing lessons learned along the way. Beware the dreaded slab of death as he makes you smile with the dry sense of humor the English are famous for.
Harvey Stack, the other half of Stack's Bowers, has several interviews posted on YouTube that The Christopher Collection enjoys. Here is a link to one in the series presented by CoinWeek.