<< For some odd reason, old video games sell on ebay like no other! A stupid nes game you can get at a flee-market for like $5 sells for $50 on ebay, ridiculous! >>
You have to realize that eBay is an international market now adays. What might be useless video game in Europe might be worth $100 here as a collector's item and vice versa. Another example is,
some countries have regulation on production and distribution of pornography but no regulation on foreign purchases or posession. An example of regulation is that anything osld in that country requires genitalia to have mosaics. People wants the full exposure version so, they go on eBay and import it from foreign sellers.
Back in the days, importation was only feasible for firms in huge quantities, but with eBay it's like shipping an item between friends that lives in foreign country.