this is due to the fact it's a pretty old system. it's existed for a while.
The PS4 is less than 4 years old. - Sells new for 258 - 300 dollars. 500+ GB and usually comes with a free game.
The Wii-U is less than 5 years old. - Sells for 349 dollars
REFURBISHED 32GB and a free mario kart game, woo!
https://www.walmart.com/ip/Refurbished-Nintendo-Wii-U-32GB-Console-Deluxe-Set-with-Mario-Kart-8-Pre-Installed/120593125the switch is like brand new, why would you expect the price to be as low as a ps4
In order to compete in the console wars you have to meet demand by price and games.
Nintendo switch is more expensive than a PS4, has less memory, less games and only thing people may consider buying it for is the first party IPs.
Not to mention it's strongly advised to buy screen cleaners, screen protectors, carrying cases and bigger memory cards as this is a portable device that will break more easily than a console. The actual price with all the accessories together will jump this system to over 400 dollars.