Full retail games are usually so overpriced on the PlayStation Network that they're not worth mentioning, but here's a rare exception - MAG is now down to £11.99 from £24.99 (until the end of this month) on the PlayStation Store. While it's not the cheapest we've ever seen, it's the best option if your local Argos doesn't have
a copy for a tenner. (And I've never found one that does.)
There are a few other Move-supported discounts to be had, including:

Flight Control HD - £1.99 (from £3.99)

Tumble - £5.49 (from £7.99)

Sackboy's Prehistoric Moves - £2.39 (from £4.79)

Top Darts - £4.79 (from £6.29)

Swords and Soldiers - £4.79 (from £6.29)

Hustle Kings - £4.79 (from £6.29)

High Velocity Bowling - £8.99 (from £11.99)

Planet Minigolf - £3.19 (from £6.29)