Portrayals Of Sherlock Holmes Plate Dierdre Keetley

OK, I paid a few dollars for this at a Sherlock Holmes collector estate sale. Then I read the following on the internet and discovered that this has sold upwards of $800.00!!!!

From the Internet:
This is one of the rarest of the rare items of Sherlockiana. This English Bone China plate was made in a limited edition by Deirdre Keetley when she had her Studio Gallery in London. This is #1702 of 5000, but there were nowhere near 5000 ever created, and we’d guess far less than half of that number. It is 8-inches in diameter, and has a 24k gold rim. The front is from an original watercolor painting by Keetley, called Portrayals of Sherlock Holmes, and it has all of the actors who played Sherlock (up to the '80s) plus Nigel Bruce as Watson, with Jeremy Brett in the center and Basil Rathbone looking down through his magnifying glass.
A total of 20 actors are included and, on the back of the plate, they are all identified using a numbered drawing.