I was just thinking about this and figured I'd post it here.
If you ever decide to sell NES games/items, avoid being like those other sellers that put "NES SNES N64 Wii" in their titles. The reason is that a lot of people searching for NES games tend to filter out those other systems. I see some stuff go for half the price it should because of this.
Case in point:
http://cgi.ebay.com/ws/eBayISA...tem&item=320104190331
That went for $50, and a cart + controller went for over $100:
http://cgi.ebay.com/ws/eBayISA...tem&item=130101486049
That's damn cheap for a sealed Arkanoid, and had that seller not done that, it would have fetched double that price, IMO.
-Dain