After the release of the Osmo Action 5 - it looks like these have dropped in price to clear stock. Combined with the Good Guys eBay deal, this could make it worthwhile for some.
Other retailers also selling at a lower price today (Yesterday it was $460~) if TGG runs out of stock:
JB Hi-fi @ $389
Amazon AU @ $388 + Free delivery
And a Youtube review:
Tamara Gabriel - Is The DJI Osmo Action 4 Worth Buying?
Excludes QLD Far North & WA Remote.
Standard combo is not worth it. Comes only with one battery which is inadequate and forces you to get more batteries which cost an arm and a leg if you’re buying separately. Best to wait for adventure combo