At the current retail price, a half pound of beef is just shy of $5.
And on Saturday, I bought a package of four 1/3 lb burger patties (ground chuck) for $7.99 and a package of burger buns for under $2 at a gas station. Kwik-Trip FTW.
That price depends a lot on where you live and shop.
I consistently buy ground beef on sale for $5/pound. Looking at walmart.com right now, they are selling it for $6.44/pound. Maybe people think cooking is expensive because they, for some odd reason, are paying $5 for a half pound of ground beef.