Quoted from xsvtoys:The Gamecubes are pretty easy to get if you are patient and look around. I got a nice Gamecube Platinum DOL-101 recently off Offerup for $40, its in great condition. I'm going to mod it when I get around to it. I still have my original GC I bought way back when they first came out, it still works fine and I didn't want to tear into it.
The gamecubes themselves aren't too bad, the DOL-001's are preferred because of the digital output for those that aren't aware. The easy way to tell is just checking the back of the console. The 001s will have two different video ports available.
The games are getting pretty out of control. Obviously everything Nintendo/Mario is collectible, but Gamecube has really seen a jump recently.
If anyone is looking into modding, the 2 main options I'm aware of are GCLoader and Picoboot. The former removes the disk drive entirely, and is out of stock at the moment. It's also at least reasonably expensive (I think normally $90).
The picoboot utilizes a raspberry pi zero (cost of about $10), and redirects the boot to an SD card. There are 2 ways to install that, either via the 2nd service port, or a memory card adapter. Again, I had some big problems with the service port method, but it's so much cleaner (being hidden away under the system). Both are cheap, about 10 each again. So if you have wires, solder, the cost of the picoboot is about $20 plus whatever size micro SD you go with. There's 5 or 6 solder points on the board, the most difficult being 2 to a small IC chip. Anyone seasoned in pinball repair really shouldn't struggle too much.