Moved up from down the board.

I have these 4 different ones but have zero clue as to any value. Can one of you much more enlightened cover collectors please give me a rough value on these.

I have a small collection of covers from older casinos but have no idea on any values. I don't collect these, I just ended up with a small grouping. About half still have the matches inside, should I remover the matches ?

Is there a web site someplace that sort of lists matches with maybe rough values ?