Interesting, where do you live that you can't buy a Steamdeck but can buy a 10 inch tablet? Those typically don't come cheap and Valve does deliver worldwide don't they?
Valve does not deliver worldwide. A few select countries. They added a few more since launch like Japan and South Korea but it's not available in a lot of Europe, Australia, etc.
Vietnam. No, they don't deliver here or many other places in the world.
I was considering getting one next time I go back to Europe for a vacation but even there it's a many months waiting list. Sure, I could get one second hand but I decided to jump off the hype train instead.
Tell you what I had to do: create a Steam account domiciled in Ireland, attach an Irish bank pass to it, order and have it shipped to my place in Ireland, then throw it in my bag and bring it with me back to Switzerland. What a pain. At least it works on my Swiss Steam account.
There are guys on the Swiss classified sites who claim they'll order for you (at a noticeable premium of several hundred CHF) but that Valve will ship "gifted" decks direct to recipients in Switzerland. I do not think this is true. I cannot personally do this with my Irish account.