This is more a Ripper than a Grabber in structure: set neck, headstock not scarved, but in one piece with the neck, probably a multi-ply neck too, three point bridge, more expensive pup. The original Grabber was a cheapo in comparison. Still, while that (and passage of time, inflation, purchasing power etc) accounts for it being a lot more expensive these days than the original was in the days of yore, it doesn't explain the extravagantly high difference, even for a limited edition.
Except that it is a Gibson bass of course. Which means not many will be sold, so you have to make a buck on those few that you actually can sell.
Still a nice surprise. I wouldn't have thought that Gibson would go back to reissuing something from its maple era.