[quote name='kuniog1']Does anyone know why the stores are not stocking Harry Potter anymore?[/quote]
Check pawn shops, they always seem to have some in stock.
Half.com has the 2-disc Goblet of Fire for $17.25+ s/h, like new condition.
UPDATE: try a website called CDTradepost.com They're a smallish store with multiple locations around the US. I used to live near 4 locations (Omaha), they're a great store, and always treat their DVDs good (or resurface them nicely).
You can order Goblet of Fire 2-Disc from them for $12.99 (a few store locations have it in stock) + $3 shipping. $15.99 shipped.
Easiest way to use their website: do any search, then click on "use old search engine", type goblet of fire, look for (2PC) at the end of the title. I see at least 3.