PENTAX SMC FA 50mm f1.4 Classic Lens $363.41 + Delivery ($0 with Prime/ $59 Spend) @ Amazon AU

Incredible niche deal for the Pentax shooters. Comes with case + ND filter.

I recently inherited an old K-Mount AF film body and this looks to be compatible. RRP is $649.99, with the next lowest price $499.95 at Teds.