"Where did these suddenly appear from?"
"Suddenly?" I told you I saw them a year ago in a collection.

"How do you know that they are genuine Borland creations?
Because of where they came from.

"Is it possible that there are more?"
Have no clue, but I never knew Borland to make only 1 of anything, in fact I have 2 of the Margaritas. Not for trade at this time.

"To include boxes and boxes of duplicates?"
Have no clue.

"What is your considered opinion?"
Clueless!!! But not in Seattle!!!