I did a quick search and I did not see it mentioned, but I saw Prey for the Xbox 360 (both versions, regular and "Limited Edition" tin) for $19.99 (new) at my local EB.
(Unfortunately I was shot down for a LE of Bioshock preorder. That's what I get for waiting 'til the last minute.)
(Unfortunately I was shot down for a LE of Bioshock preorder. That's what I get for waiting 'til the last minute.)