All 105 of the original episodes of Gatchaman, or Battle of the Planets or even G Force to the US and my fellow Brits, are available in a single Blu-ray box. Better still, the OVA episodes are included.
And even better still, it's now on sale at only $59.99. So I just bought it. The 22-DVD version is there too, at a slightly more expensive $65.95 if you use a third-party.
A word of warning, or really just a letter. The Blu-rays are Region A locked, so you'll need to either be in Region A (ie. America, Canada, etc.) or have a multi-region player.
Here's a quick unboxing video for the curious.