Saw these outside Spotlight Indooroopilly (QLD) this morning and it looked as though quite a few had already been taken off the pile. Took a pic in case it was a one-off but got home to find them on their website for the same price so it must be nation-wide. Couldn't see them in any of the current catalogues though.
I'm definitely not into sewing but know that some of these Spotlight cheapies are good for basic work and/or beginners so I hope this helps someone run something up :)
Have a feeling these may only stay at this price until tomorrow though so best to act quickly!
Not sure about stock, but Aldi has a Singer brand sewing machine in their current catalogue (started 11 April 2015) for $99.99:
https://www.aldi.com.au/en/special-buys/special-buys-sat-11-…
I don't know anything about sewing, but I'm assume Semco is a random/house brand? Might be worth the extra $20 for the Singer brand and 3 year warranty?