Buying New Panties

I have a lot of panties but not enough in purple, so to get rid of the ones i don't really want all that much, and no you cannot have them unless you live in michigan and are female or a sexy sissy and are willing to model them for me, I want to buy purple panties that I will be satisfied with.

So does anyone have any advice on finding some nice purple panties. Granny panties that is, vintage sissy, nylon, satin it doesn't matter as long as they're something that my 69 year old math teacher wore back in 1999