There is one historical example, in Zurich's Landesmuseum, that gets mentioned a lot. There are several others, though, and I thought people might like to see them.
The first is an estoc formerly in the collection of Eric Valentine, who published it in his book Rapiers: An Illustrated Reference Guide to the Rapiers of the 16th and 17th Centuries, and their Companions. It's German. The blade is dated 1546, but the hilt is thought to be half a century earlier. It was in the UK-based antiques dealer Peter Finer's 1996 catalogue. The listed asking price, as can be seen, was $42,000. Arms & Armor replicated it as a custom piece:
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The second is from a private collection. Photo by me. I don't have dates for it or much info on it. The grip and cross are slightly loose, but I remember it to be a lively sword.


German Estoc, 1546. Copyright Peter Finer


German Estoc, 1546. Copyright Peter Finer


Text Copyright Peter Finer


Thrusting sword. 15th century?