I'm a fan of the Fire Emblem series ever since it appeared on the GBA those years ago. When I got around to buying a Retron 5 and found out that the system could patch famicom games to play in English, I decided to look for a copy of the first game in the series so I could see how the original played.
I found a copy here for $13 with free shipping from a Japanese seller and decided to try them out, figuring $13 was worth the risk considering that other sellers were offering it for up to 10 times as much. The cartridge arrived back in April in good shape, though the save battery sounds like it was knocked loose in transport. Plugged in and it ran just fine and once I got the translation patch applied, I was having a blast playing the game. At some point in the future, I'll probably open the game up and remount the battery, but I am very satisfied with these folks and will likely buy from them again.