|As often as I use seam rippers, I only had one of them. I had to buy another one when it unknowingly to me took a dive into my elastic bag next to my machine and was AWOL for a few days. I thought it had fallen into my wastebasket on the other side of the machine and was a goner.
In any case, having two has been very handy - especially lately! ;)
For about a dollar, why not make it easier on yourself and have a couple ready and waiting. Frustration is high enough when you have to unsew. . .