Spam will keep virtually forever, even under less than ideal storage conditions.
There are fourteen varieties. I like the Garlic, Hot and Spicy, Jalapeno, Teriyaki, Smoked Bacon, Turkey best myself but they are all pretty good.
You can make Spam sandwiches, or you can fry it with eggs, or cut it up and serve it with noodles, mashed potatoes, or rice. There's just about no end to ways to serve it.
It makes a great addition to your long term food storage.
The link above will take you to a vendor who sells all fourteen varieties. It's very difficult to find them all in one geographic location. The cost is a bit higher, and the shipping is not cheap, but it's one way to get a good selection.
If anybody knows of any other on line sources, or stores where you can go and find them all, I'd like to know about it.