What are my Matchcovers Worth?
There are really no set prices in this hobby. Older covers generally bring higher prices as long as they are unstruck and undamaged. After that, it depends on who is bidding and how badly the bidders want the material. Matchcovers are made in the millions and so most are only worth pennies. Most accumulations of matches picked up over the years have more sentimental than monetary value. Collectors of matchcovers don't get involved in the hobby to get rich.
You can try checking Ebay's current listings to get a feel for the going prices on various types of matchcovers or you can attend a matchcover club and meet other collectors that might be interested in buying or selling.
Just keep in the back of your mind that the value of a collection largely isn't monetary. The value is in the pleasant hours spent finding, organizing, displaying and caring for your collection and the many friendships you make along the way with fellow collectors. There is also a sense of accomplishment when you have accumulated a collection that is respected by your peers. Have fun!