Aaaaaaand if the power goes out.... ;)
Slightly one-sided, but I hear ya. However, it's not for me.

"Selling MTG cards for money almost requires you to be an expert in online sales.."
So true. I did it for 17 years until recently. Played for years before I went into business, too.
Did you ever get into online forums for MTG stuff?
I used to moderate a forum called "The Rumor Mill", on MTGNews and MTGSalvation. We ticked off Hasbro/Wizards of the Coast for many years, excitedly talking about upcoming releases.