I have seen them at the dollar store and tried them once. They were OK.
Oh yeah, been eating those for years! Various different brands, though. Trader Joes had wheat ones and mini ones, that I really liked.
BUTTTT, I have to add that while they are great in a pinch, once you’ve had the ones made from scratch, there is little comparison. The homemade ones (or I hear you can buy them frozen in grocery stores) are SO soft and pillowy. The texture is completely different. It’s kinda like how the semolina gnocchi and potato gnocchi don’t seem like they should be called the same thing, they are so different.
But I love these packaged ones for soup - they never seem to overcook. And the mini ones are a great size for soup too - like the olive garden soup that was posted here. Its’ hard to make them that small from scratch.