I have a question about expansion sets. I read in the back of the core book about all the expansion sets that are available, when trying to find them on sites like amazon they are not searchable, and FFG says they are unavailable also. Do sets get released for a set amount of time and get discontinued till a date in the future? Not sure how it all works. Just asking because im looking for the Valar Morghulis set.

That pack is, indeed, hard to find currently. It will get reprinted eventually. They create a print run and when enough of a full cycle's packs go out of stock, they'll release a reprint of the entire cycle.

If you really want Valar Morghulis try http://www.eaglecard.org/

I think they still may have it.

I have a question about expansion sets. I read in the back of the core book about all the expansion sets that are available, when trying to find them on sites like amazon they are not searchable, and FFG says they are unavailable also. Do sets get released for a set amount of time and get discontinued till a date in the future? Not sure how it all works. Just asking because im looking for the Valar Morghulis set.

Try ebay. Found one for you:

http://pages.ebay.com/link/?nav=item.view&id=360707944862

Bed stark has no head.