Yup, yup and yup. I'm a cheapo. I admit it. I have an 8x24 ruler that the one side is quite eroded, I did go so far as to make a large mark on it with a magic marker so I knew that was the old one. Then I bought a new one. Now I use them both for squaring up a quilt - just put them at right angles to each other and it gives me a good square for marking.
I have a triangle ruler that has the one tip broken off.
I don't think I've ever thrown out a seam ripper - I just get a new one and the old one disappears into the nether world of my sewing room.
I have a pill bottle full of broken and dull needles. I've been known to pull out one of the sewing machine needles if I'm working on some really heavy fabric, or paper, or with plastic. Wouldn't want to waste a good needle on that :P
I have spools of thread that have been chewed by the dog, or are 15 years old, and just can't seem to toss them.
And the list goes on....