Even better, its only $399! I think its a great deal at only 50 bucks more than the OLED switch model personally.
https://store.steampowered.com/steamdeck
By all accounts, the entry level model with a large microSD card performs just as well in games as installing on a more expensive model with a larger built in SSD. The only other feature you miss out on really is the most expensive config has an additional antiglare coating. The CPU/GPU configuration is exactly the same on all models.
I actually ordered the most expensive config, but with what I know now and having tried a friend's entry model, if I ordered again tomorrow I would just buy the 399 one with a cheap microSD card. Some folks even prefer the extra contrast of the display without the anti-glare coating.
The microSD cards are hot swappable too - you can carry a bunch with different games installed if you wanted, the Deck OS instantly repopulates your game library with the contents of whatever card you just inserted.