What a photographic item is "worth" in money is defined by what a willing seller will take for it and what a willing buyer will pay for it. And that, in turn, depends entirely upon the mood of the seller and of the buyer. Some guidelines and warnings for buyers and sellers are at http://www.marriottworld.com/articles/value.htm At that site you will find not only a brief discussion of such factors as age, condition, collectors' interest, and location, but also a note about the standard price-reference for old cameras, "McKeown's Price Guide to Antique and Classic Cameras."
For specific books, you could try looking on Ebay for "completed items" or on Amazon as several antiquarian or rare book dealers trade using Amazon.
That depends on what set it is from and how old/rare it is. If it is extremely rare, it is worth a lot. If it is really, really old and in mint condition it is worth a lot. If it from an old pack it is worth a lot. (Packs from HeartGold, SoulSilver, Platnium, Black, or White are not considered old.)
It depends how old they are. Not much, probably how much they used to cost.
how much it a 70 year old mickey mouse doll worth
two bob or half a crown in old money
If they are limited edition and are old, probably worth more than $10000.00
Go to ebay.com or amazon.com and see what other O Henry books are selling for.
it depends on what kind of book it is. If it's an old textbook the publishers have made many revisions, and put our new editions about every two or three years. Old textbooks aren't worth much, except to the user or student who used it. Clasic books can be worth more to fill out a library but again not much. You may want to go to ebay to see what new and old books are selling for.
How can you find out the worth of an old policy?
by putting it on eBay and seeing how much its worth
I don't know how much they will be worth but you could check on Ebay.
175v 604-1
about 10,000 dollars if some of them are really old classics
How much do old cheerwine bottles worth
How much is a kesral avon bottle worth
Go to a mine website by the way I am 7 years old
Old books about basic programming can be found in libraries. One will find many good old books for programming in libraries of colleges or universities.
of course! all old books are worth something. you should try to find a local used book store or rare book store and ask them. I know my grandfather had a 150 year old hymnbook from the Church of Jesus Christ of Latter Day Saints and it ended up being worth a thousand dollars! some books are worth more than others, but its definitely worth looking into.