Looks like I might have just gained a hobby. My poor widowed mom asked me to take a look at her coin collection. When I looked I said, 'Um...mom, I think you might have some money in here. That's a penny from the civil war.'
Anybody know any coin collectors?
not sure what your mom has, but for quite some time the price of silver has made "coin collecting" something of a misnomer.
almost all of the run of the mill loose silver coins are going to be worth more for their silver content than their collectibility, unless they are of exceptional quality, or are very rare.
if she truly has a serious collector's collection (ie coins that have been graded professionally, and are of high quality or extreme rarity), then you need to do your research and if she need the cash, consider selling them yourself on ebay(you'll pay less commission than going through a dealer or auction house but it can be a hassle if you've never done it)
however if most of the coins are basically loose silver American coins from the 1900's up to 1964 then your best bet is find a pawn shop or jeweler who pays the most for scrap silver and sell them in bulk.
and sorry to burst your bubble but searching "civil war penny" on ebay reveals over 500 listings, and the top price that actually has generated any bidding appears to be about $7.