These aren't the best prices they've had at SE, but still quite good as they include free standard shipping. With the devaluing of the A$, the prices can only go up.
OCZ Arc 100 120GB $86
OCZ Arc 100 240GB $122
OCZ Arc 100 480GB $255
Crucial MX100 128GB $89
Crucial MX100 256GB $132
Crucial MX100 512GB $265
Crucial M550 128GB $90
Crucial M550 256GB $137
Crucial M550 512GB $265
MSYs are cheaper.