Expiry date on acrylic powder

[Nails at Home]

Sorry for putting in this thread again but I could really do with some help on the answer - has anyone got any knowledge please?

Could anyone tell me if there is an expiry date for acrylic powder? I've got quite a few jars of Creative perfect colour and solarnail which I don't use anymore and thought about selling them VERY cheaply if they're still good to use.

Thanks