I have recently acquired several hundred thousand collectible cards
spanning several games. I need a program of some kind to
database/inventory of the cards that I have. This software needs to be
able sort accorting to each games individual set as well as each game.
Other features I need are; how many of each card I have, collectors
price, easily editible (ie. user friendly), and a good search
function. It does not need to build decks or keep track of tournament
info, I'm only only looking to inventory the cards. I'm looking for a
Windows program, but it would be nice if I could import the data to
Mac or Linux, but it's not needed.

How good is your computer knowledge?

Microsoft Access is a standard database program which could do
everything you need but it takes a while to learn - see
http://office.microsoft.com/en-gb/FX010857911033.aspx

That might be a little more program than I need. But if there are no
other options, I'll have to use that or something like it.