Nintendo Switch Lite Blue
Though I’d like to add on to my first answer in that while yes your external accessories will work(wireless controllers work perfectly fine as I used the nano controller when I had my lite before I traded it in for the regular switch) but anything that must be plugged in especially if it has to be via a USB port will not be usable as the lite only has the C-type charging port so you’d need a cable that would be a USB to C-Type converter. I recommend just replacing the normal switch as well as paying for the protection plan I never buy those for my consoles but in regards to the switch I’m glad I did/will never not have one for it. Plus the lite can’t connect to you’re TV to play on and is purely handheld only
Yes you can. The trade in value though will be much less than the new one price plus tax. Depending on how badly you need the money, trade in value or want the new one, I’d recommend you keep the old yellow one to play with an extra buddy online or wireless network . Selling it to get more value for the money would be the best option.