TL;DR: Steam briefly showed options to buy refurbished Steam Decks for the following prices:
- 64gb - $319
- 256gb - $419
- 512gb - $519
The steam page has since been taken down, but will hopefully go live officially soon.
Edit: That was quick, refurbished units available now.
Yeah, that would be the plan. I did the same thing with my Switch and it just automatically uses it as additional storage without any fuss. Does the Steam Deck do the same thing?