NES: It's in okay condition, but I need to buy another extension port cover as I bought mine at a yard sale and did not come with it. The plastic that covered it was also ripped off from the looks of it, deteriorating the look of the underside in my opinion.
SNES: Bought it used and is in great shape! It is a second revision of the first model where they did not paint the labels on it, but I guess I should not worry about that.
N64: Bought used and is in excellent condition.
GameCube: Was my first video game console and received used. Logo plate is a little scratched up and there are a few marks from previous use.
Wii: Received new and was my second console. The glossiness has faded a bit from me constantly moving and rearranging the console in my media shelving, but is in great shape despite its almost daily use from 2008-2013. It now gathers dust in a room across the house and is used as my mom's Netflix streaming device. I went to play Brawl about a year ago and it did not read the disc. I have had yet to test it with my other Wii/GCN games to see if it has disc reading errors, but will sometime soon.
Wii U: Received new and I have kept in excellent condition, even going as far as preventing my skin from touching its surface without either using a microfiber cloth or using the pink part of my fingernail. Underside of the console has extensive scratching from the first year of ownership as I would have it sit on top of an original Xbox, causing it to slide off one of its sides.
Other Home Consoles:
֍PlayStation 2- I have had a lot of trouble finding a fully functional PS2 and have gone through $110 and two consoles to find a fully working original PS2 at a garage sale for around $40. The console works amazing and plays all of the formats it was intended to. (DVD, CD, PS1 and PS2 games!) The disk tray does rattle a bit when you eject, whether the motor is going bad or what, I don't have a clue, but I feel it will not have to be replaced anytime soon. The plastic casing has some minor scratches from use, but are hard to see without some good lighting.
֍Xbox- Bought for $14 with only a power cable, has some scratches/dents from prior use, but works great! Reads DVDs and games fine. I did find unfortunately that I own the model that prevents burned audio CDs from being played, but my store bought CDs all work except for one Green Day album.
֍PlayStation 3- Bought in excellent condition with not one problem. It is almost like new practically! Considering my PS3 came with a stock 120 GB hard drive, I may upgrade to a 1 TB hard drive soon to future-proof the console.
Handhelds: Almost all of my handheld gaming devices are used and have scratches on the screens, but not enough to be a hindrance during gameplay. I had my DS Lite repaired and received my original 3DS new and bought my New 3DS XL recently. My original 3DS however is unable to read physical games anymore, so I quit using the console for mostly everything but StreetPass and downloadable multiplayer games.