Updated: Jul 30, 2020
https://www.forumancientcoins.com
Lots of information for the beginner and the more seasoned collector. Their online shop offers thousands of coins for the collector.
If you like to chat about your coins this is the place for you. It is friendly and informative
Places to buy ancient coins
This site has auctions for all levels of collector. They have printed as well as e-auctions.
https://www.vcoins.com/en/Default.aspx
This site has many sellers offering thousands of ancient coins. This is a safe place to buy because the sellers adhere to a code of conduct.
This site is an auction aggregator. There are many auctions offered. Some auctions are mostly high end while others are entry level. Still others have a mix of affordable and expensive lots.
Another auction aggregator. Again a mix of auctions are offered.