This was $199 from Sydney Tools many months ago as a pre-order, but quite a nice bit of kit that includes the tool, the battery and the charger. The battery alone costs $149 so $100 for the tool and the charger is a bargain.
18V should be more than enough for home use (DeWalt also do a more powerful 54V version, but be careful, angle grinders are serious tools)
Other stores have the same deal as well (Bunnings, JustTools to name a couple) so feel free to chose your store of choice.
Edit: I've just seen it for $189…Cairns Hardware FB post
https://www.facebook.com/cairnshardware/posts/-hot-offer-dewalt-18v-xr-brushless-125mm-angle-grinder-kit-dcg406p1-xe-only-189-/2356637031320061/
I'm a twit. Ignore this FB post, it's an oldie. $249 still the best deal.
Enjoy!
RRP $599
18v is really good enough for home use. After all a lot of tradies are using 18v tools.