I've been holding onto an N64 Digital kit since Pixel FX launched them. I figured, if I was going to fork out the $ and pay someone to install it. I might
Nintendo 64 Expansion Pak
Getting Started With The Nintendo 64 | RetroRGB
Nintendo 64 Game Pak - Wikipedia
CIB EXPANSION PAK MEMORY CARD NINTENDO 64 N64 VIDEO GAME COMPLETE W/ PROTECTOR | eBay