1 used Kuat NV2 popped up on GearTrade for $327. I'd be all over it if I didn't already have an 1upUSA rack+1 addon.
Platform hitch racks are the best for hauling FS mtn bikes, and this is considered better than the Thule T2, not to mention it also comes with a workstand on the end of it. Seller is Backcountry.com, who is always awesome to deal with. Grats to whoever nabs it first. These really do sell for $500 new ($300-350 for the 2 bike add-on, to make it able to carry 4, if you have a 2" receiver that can support the whole setup).
Kuat - NV 2 Bike Rack Black Chrome, 1.25in - Good
Mtbr's 2016 Winter Biking GearReviews and Roundups
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Thread: Kuat NV2 $327