How much can I sell my Stadium Events for?

Hello, I just came across a copy of Stadium Events. I did confirm that it is the NTSC version of the game. It is cartridge only but in very good condition. I was wondering how much I could sell it for and if anyone would like to make me an offer? I will probably be putting it up on ebay in about a week. Is that the best place to sell it? Also, I bought this bad boy for $5! I just need some help finding the best place to sell this and how I can get the most money.