I'd say, first off, 224King is right, the Fibermark is a different animal, with a real synthetic stock (graphite/fiberglass, not injection molded plastic) with pillar bedding from the factory. Being a McMillan stock adds value, as well. Generally speaking, I've seen quality specimens in the 90-98% range running $650 on the low (and rare deal) end, up to $900 on the high end. Get one for anywhere between $700-800, and you're getting a good deal. Moving up to $850, it better be equivalent to NIB.
The synthetic in the link Marishka provided is way overpriced. The Nikko scope is junk, and worth about what a Tasco or Simmons would be on that rifle. Beyond that, you're looking at a tupperware stocked, Japanese-manufacture Mark V in a great chambering, but $900 is a 30-40% premium over what it's worth. Watch that rifle a few weeks and you won't see a single bid on it. You can find better pricing on Fibermarks, or if you want to spend $900 and up, get a deal like this one:
http://marksoutdoors.com/used-guns/weatherby-mark-v-2/The only caution I'll give on the 24" barreled Fibermarks is they are the #1 contour barrel, and will be susceptible to barrel heating at the range and in the field. The slimmer profile also will potentially be harder to find the perfect load, as barrel whip will play a role more significantly than the #2 contour of the 26" Fibermarks.
If you like the 24" barreled gun you've found, and don't mind the trade-off of slimmer barrel profile (which does get you a lighter carry weight, which can be a plus if you hike a lot), and the price is good, go for it. But there are deals out there if you'd rather have a 26" barreled gun.