OPI and Essie Gels are only distributed to professionals, so that's probably why you can't find them in stores. Since they're only for professionals, I don't think a salon would sell to you.

Writing on the front of the bottle. Genuine bottles have ``mL'' and ``Fl'' at the bottom. Fakes apparently don't capitalize the letters correctly. Not any more. My fakes have the fonts right.

OPI is a leader in nail polish brands. It's more expensive than other brands because of the quality of the polish. I like OPI polishes however, my go to brand of nail polishes is Zoya. You get what you pay for and I believe OPI is one of the best nail polishes that's comapred to China Glaze and Essie.

OPI. Is an acronym for Odontorium Products Inc and originally specialized in dental product.