Ahhh, memories:
That was part of May's campaign to get her to be accountable. Might be interesting to check in a month or so to see if she's listing them in the 1970-to-now category. My bet is that she will still list them in the pre-1970 category. Her present listing is completely pared down in comparison to the one M!b$ quoted. This dislaimer probably protects her from any eBay actions no matter what category she lists in: "PLEASE REMEMBER THAT SOME OF THESE MARBLES MIGHT BE NEWER I'M NOT A EXPERT".
The question I have is how does one get all the new marbles she has http://shop.ebay.com/tammysvintagemarbles/m.html?_dmd=1&_ipg=50&_sop=12&_rdc=1 without knowing that they are new? How long can she go with that disclaimer? It could be mildly interesting to follow. As an academic exercise.
Has she been selling before with a different but similar sounding ID? The name sounds familiar, but according to eBay, she didn't change from "mythisorthat" to "tammysvintagemarbles" until March of this year.
All these sellers of antique Vacors and Jabos start running together after awhile.