Mullet, I am with you. I looked at the "Museum" ad and I am not so sure those are not modern points either. Some of them may be the real deal, but to have that many "absolutly perfect" points....
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As for selling on eBay... It will not surprise me if the glass ones sell. You can sell almost anything on eBay. I saw a guy sell a stick he picked up in the woods. He advertised it as a possible magical wand. He was up front about it saying he fond it under a tree on a walk. Said it didn't have any magical properties for himself, but in the right hands, it "might" have magical properties. Damned it someone didn't buy it. Think about it, I bet you could sell a bag of bunny poop. You just have to advertise it right. Something like "Secret ingrediant the Native Americans used to make pine pitch for mounting arrowheads". I bet you could get $10 bucks easy!!!!