I’ve noticed some slightly obscure Xbox 360 titles rising in price lately. Anyone know why demand has gone up suddenly? Examples: Spec Ops: The Line ($15 to $35), Spectral Force 3 ($20 to $100), and Lost Odyssey ($20 to $35).

Halo 3 limited edition and Fallout New Vegas on XONE have climbed too, though they aren’t as obscure.

Are collectors starting to focus on Xbox 360 titles?