Since this thread got revisited by the obviously inappropriate commercial post, I'll take the time to mention that I will be giving two Zoom based talks on coin subjects over the next two months making use of what I have learned about Zoom. The easy way is screen sharing images but I do have a second camera pointed down at a coin sized area that allows wiggling the coin around 'live'. Programs may be easier prepared in advance but I would be surprised if one on one Zoom meetings are not used by sellers showing coins to potential buyers and handling 'live' questions about them. This would be a Covid era version of a coin show or visit to a local coin store without the exposure to virus. I will be posting about my experiences with the meeting after they occur. It is very much a learn by doing experience.
Zoom's screen-sharing function – on your laptop – allows you to choose your iPhone screen to share (via AirPlay or a cable). So you can use your iPhone camera to show coins. Neat!