What Happened with this Piece of Anchor Hocking Glass?

By accident, I got a set of 4 AH Soreno small bowls that due to some freak of antiques are selling for the outrageous price of $20 each on eBay. But it's AH glass so it's not the best quality as it was made to be affordable. All 4 bowls have what looks like streaks in the bottom, but they're not scrapes, they're part of the glass. I suspect a manufacturing flaw but I'm at a loss as to what and how to describe it. I re-read my listing and I wrote that there is some "marring" in the glass. Did I make that word up? Should I keep it?

Here's photos. See the streaks? What do you think? TY

 

Yep-I see the streaks and it reminds me of mineralization- the kind I see on excavated antique bottles. You could also try the terms 'classic Anchor Hocking factory mold stretch marks' or 'typical Anchor Hocking glass mold striations'.
Why the price?
Poss answer-our grandkids didn't experience the 'battle-ship' level quality of manufacture we did as children, and even when these were made in the late 60's quality was falling-hence they see this **** as exotic (?).
Think it also has to do w/ MCM 'Granny Chic' (Grandmacore-YUK).
They look back on that era not as assassinations,riots,Vietnam, but as a Brady Bunch paradise of 10k houses and 2K cars-and ignore the $1.65 min wage most of Us made.

 

Whole lots changed in the last decade and a half buyer-wise. A fair amount of potential clients were 10 last time I sold !

 

Thanks, bosko! Excellent advice. I won't be asking what other Ebay sellers are, but I think if they're that desirable, someone will be happy to pay a lot less and get very usable bowls that still look good. I was thinking another culprit might be the dishwasher, except that the streaks are just on the bottom.

 

Does look like etching from a dishwasher.