I just got an email from Sony offering me a percentage off Unit 13 (Vita). It's currently on sale for £19.99 on the store but as I don't have a vita or any intention to get the game, it's useless to me. However it might be of use to someone else.
Obviously as it's a vita game, it's important you own one
Since Vitas are region blocked, I would recommend that you live in the uk.
If you meet both criterias and actually want the game, send me a PM and I'll give you the code.