What daya think I look like.. Antique's Road Show? hhehehehehhee
Honestly, not much. There are TONS of old bibles around. People often times hold onto them and pass them on to family... so there are a lot of bibles from the 1800s around.
Being that they are considered the word of God, it is not uncommon for people to take really good care of them..meaning that they last a long time.
You'd need to know what translation and who the manufacturer is, anyways, merely being "old" is not enough.
I'd say a King James, nothing special about it - probably about $50-60
Hard leather with ornate design, color pictures, maps, etc. maybe $180-200
Wooden binding/cover of ornate design, with pictures and maps maybe 200-300
A rarer Douay Rheims with simple leather or paper - maybe $80-90
Ornate Douay Rheims with Leather or wood - $300-400
http://cgi.ebay.com/ANTIQUE-1800-LARGE-CHURCH-BIBLE-OLD-AND-NEW-TESTAMENTS-/250634089149?cmd=ViewItem&pt=UK_Collectables_ReligionSpirituality_EH&hash=item3a5af4b2bd#ht_500wt_1080
PERSONALLY - I use a 1941 edition of the Douay Rheims 1589 translation with pictures, maps, family tree, a place to record your children's Sacraments and an Encyclical written by the Pope in the front.
My parents bought it for about $60
Unfortunately, My dog is apparently an atheist and I left it by my bed and he chewed on the front cover.
hehehehehhehhee
P.S. I'm kidding about my Dog's faith.. he's really agnostic.. hehehehe, actually, probably more Budhist. LOL