Dang, those are some high prices even by Nintendo standards. If I had to price them by considering decent profits, relative affordability, and similar pricing for controllers & accessories I'd price them at...
- Switch Pro Controller ($59.99)
- Switch Joy-Con Set ($49.99)
- Switch Joy-Con Single ($29.99)
- Switch Joy-Con Charging Grip ($19.99)
- Switch Dock Set ($69.99)
- Joy-Con Set of 2 Wheels ($14.99)
and just for the fun of it
- Nintendo Switch Console ($249.99)
- Nintendo Switch Console + ARMS Game ($299.99)