I just purchased this today from an eBay
auction, got it for $2.50 plus shipping which seems reasonable compared to others on eBay
. I've gone about as far as I can go with my GB collection, without re-mortgaging the house, so am starting to collect GB postal stationery. I have about 50 so far and there are probably a couple of thousand so I have a way to go, and most seem to be pretty inexpensive, I found a few in the $1 box at stamp shows. Anyway this one, issued in 1890 for the 50th anniversary of the Uniform Penny Postage, seems to be the first British postal item that not only commemorates a specific event, but even SAYS so. It's a two-part souvenir item, with the outer envelope with pre-printed stamp and the inner card with a picture of Sir Rowland Hill on which, presumably you would write your message. I think it's kinda neat.
Incidentally, stallzer's post of the 50 cent Canada stamps showing the BC Parliament building reminded me of a very pleasant trip my wife and I took about 7 years ago to celebrate our wedding anniversary. We stayed at the Fairmont Empress hotel, which is located at just about the point from which this image was taken, and we took stroll over to see these buildings up close, about a two minute walk.