steam deleted all my items from basket

If you have clicked Purchase button at any time, then your basket might be saved as a failed purchase if you don't have enough wallet money to cover the total. Go to Support > Purchase, not sure of all the steps but it should list successful and failed purchase attempts.

You don't have them on your wishlist?

VolVo Tuesday's Party!!!

steam client and browser baskets are seperate, maybe ckeck both...

In the past, I've found that steam will empty my cart after a while if I don't complete the purchase. It usually happens to me during sales, so I try to write things down if I'm still pondering. I don't know if refreshing my cart daily and adding/removing something might preserve it or not.

You shouldn't use basket to save items that you want to buy, that's what wishlist are for, because basket will reset if price changes etc. Maybe steam have to consider a near buying basket for alt but for now you have to keep track your own list, I suggest use https://barter.vg, or just write yourself the list.

Like others have said, Tuesday maintenance. It's very unlikely that it will ever survive Steam servers being rebooted so next time open them in tabs and leave there until bought, bookmark them or list in any other way.

You can always look at your browser's history to see which games pages you've visited.

Maybe buy them not in "one click". It make no difference if you buy them in parts. 5 Games, then at the next day 3 or whatever.
I don't see a advantage to store and buy them then with "one click" (besides from maybe write the payment info only one time)

Take a screenshot of your basket (two+ if it's long xD) and save it next time. This is pretty common with the big seasonal sales and all of the hiccups that entails.

I usually create a bookmark folder during sales and put things I intend/consider buying in there, because I don't trust the basket.

It's happened to me a bunch of times. Usually if I have to add to my wallet, it will wipe my cart.and I have to start over.

Items in basket is not stored for a long time, it is cleared after a certain time.

In my experience Steam empties your shopping basket after three days.

try sorting by tags you play most, you easily hit the same tags over and over again, might be able to find a huge amount of what you lost

dont make 60+ items baskets next time