Congrats
Found this info at the pcgs site, if you got that for a few hundred bucks I think you did alright.
1850 seated liberty dollar
NGC AU-58. Ex - Heritage Numismatic Auctions, Inc.'s "Long Beach Signature Sale", May 31-June 2, 2001, Lot 6312, plated, sold for $2,472.50
I am under the impression that plated, in reference to a coin in an auction, means that there was a photo of the coin in the description in the auction catalog.
You could very well be right about the term "plated" being used in that manner. I'm going to dig into it some more....wouldn't be the first time I was wrong about something. Thanks for the input. Never too old to learn.
If I saw this photo of the coin, I would have said it was 100% original. Just goes to show you how important pictures are and how easy it is to give the buyer the wrong impression about a coin.