I'm not sure if any rare shields are worth anything. Most pally shields people want are unsocketed or 4 sockets, an elite base (i.e. the Hell version of an item; that Heraldic Shield is normal, exceptional would be Protector Shield, elite would be a Kurast Shield), and roll with a solid amount of resist all. Something like 30+ all res (max is 45).
They're valuable because people make runewords in them.
Now there might be some godly roll for a rare shield that would still be desirable, and by all means, someone come and correct me. But afaik, you really want to look out for socketed shields.
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Kasor
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