I started my nail polish collection from zero in 2014. I am not a completionist, i.e., I don’t buy full collections en masse. Instead I pick and choose and carefully research. This is partly thanks to the prohibitive cost of nail polish where I live (“I’d love to pay $20 for one bottle of OPI!” said no one ever), and because retirement doesn’t save for itself, kids.
The link below will open a PDF that answers: “Just how many polishes do you have, woman?”; “Have you tried them all?”; “I want to give you some polishes, but do you already have them?”; “Is there really more to life than OPI and Essie?”; and “Wait… how many polishes did you say you have??”