I doubt there's a single example where a more expensive bullet can be proven to have some value proportional to its price. That is because value is a factor that is completely relative to different users. Some people are willing to pay a lot more for a bullet that might only offer a modest chance to gain a point or two more in a match, but which can nonetheless possibly make the difference between winning and not winning. Clearly, not everyone is willing to pay half again as much for a bullet or other component that on paper provides only a very marginal increase in performance.
I'll add a little to Wade's post above regarding high BC .224 bullets for use in F-TR, which was spot on, IMO. In my hands, Hornady's 88 ELDM has already surpassed the BC of the Berger 90 VLD in side-by-side comparisons by a significant amount. However, the 88 requires a much longer freebore chamber to load optimally, typically meaning a new reamer and barrel, and like the 90 VLD, some users have had jacket failure issues with the 88. Although I had no trouble working up good loads with either bullet, I found the 88s perhaps a just a tick easier in terms of load development.
BC, required chamber specs, ease of loading, and inherent precision are all factors that can be weighed to decide whether some bullet is really "worth" the cost. Not everyone places equal importance on each factor. I'd be willing to pay a lot for a .224 bullet that would allow performance even closer to being on par with 200 gr .308 bullets (i.e. even better than the 90 VLD, which I currently regard as the "gold standard" of heavy .224 bullets), that had no issues with jacket failures when pushed hard, that was relatively easy to tune, etc. I've won a lot of F-TR matches shooting a .223 with 90 VLDs over the years, but it's becoming more and more difficult with the widespread use of 30 cal bullets like Berger's 200.20X. Personally, I'm happy to wait patiently until Hornady sees fit to fill in the 90 gr .224 BC value in their A-Tip bullet table, then decide whether they're worth giving a test run.