I have never seen it before but Jaycar are having a 50% off sale, for components now. Walked in to purchase 2 of everything on attached schematic (everything to the left of P1,P2), except for the TL431 which they don't stock and the LED which I have. Grand total was AUD $13.16, I almost fell over. So if you need some components and have a Jaycar nearby, now might be the time to visit.

P.S. please don't try and compare Jaycar to a Mouser etc. they have never been noted for their exceptional pricing, their claim is convenience.