The endless slow hunting is the fun of it. If I can add a few new Exhibit cards to some of the sets I collect every year I think of it as a good year. On most of them, the obscure stuff, I end up getting cards only when a group is discovered. My latest, took about ten years to get, the only Exhibit card of Hawaiian surfing legend and Olympic champion swimmer Duke Kahanamoku:
As for price etc., when it comes to cards you may see only once in several years you pay what it takes and take whatever condition you can get.