i want to buy Garrys mod but i wont have enough money if summer sales stop ( everything is in my inventory but selling is slow )
Nope
no, all you can do is disable your card, try to make the purchase.
this saves the discount for 72hours, u can find your saved cart in help => steam support => purchases
No; you cannot. Just hold onto the money while you wait for the next sale. Looks like the game has been going on sale like every 2 or 3 months.
No, Steam forces you to wait, BUT they have a policy that anything in your cart will remain discounted for 24 hours, put it in the cart and wait for the money to drop for you.
If I recall, it'll only remain discounted if there was an error while trying to make the purchase.
You can't just add a bunch of games in your cart at the end of the sale and have them sit there for 24 hours at that discounted price.
Not true. I had that last sale and it the sale got removed instantly.
No.