All old photographs are worth preserving, preferrably if they are of world war I. Contact Chistys' and they will assess the present value of your precious collections.
I don't know how much they will be worth but you could check on Ebay.
it depends on the pic
Photo slides of World War I would be worth quite a bit of money depending on their condition and the contents of the photo. High quality photos of the war are somewhat rare due to photography techniques used in the period.
Not much
The value of the photo will rely on what type of photo it is. If it is a first generation photo, or a modern reproduction that sells in today's market for about $10. The photo you have could also be a wire, or press photo, and could be worth anywhere between $50.-$200. Even if it is a snap shot taken by a fan it could sell in the $50. price range.
Unless if the photo is autographed or previously unpublished the value would be minimal.
signed photos usually arent very much but a fan could pay a lot of money for one
1000
$200US
Depends on the subject matter in the photo. If the photo is of a famous person it will be worth more.
not much, the steelers let him go.
1000$ for an 8x10