Ah, Shit on a Shingle! I've made that before, but here we use chipped beef (the stuff in the packages - Carl Budding is the best, IMHO)
But $3 DOES seem awfully expensive when you get can get 1.5+ pounds of ground beef for the same price, which to ME would go a lot further than a can of Spam
Then again, remember, I do not yet know the joys of Spam, so I might find out it's worth the extra cost