Post-Season King of the Mound: Josh Beckett
Josh Beckett was nearly flawless through his four '07 post-season starts, pitching 30 innings and allowing only 4 ER & 2 BB with 35 K's and a 1.20 ERA. In this World Series, he actually pitched better (in ERA, K's/9IP & BB/9IP) than he did in '03, when he won the WS MVP with the Marlins. Despite his modest regular-season ERA of 3.27 (6th in AL) and 194 K's (7th in AL), he should still be a close-to-consensus AL Cy Young award winner.
His 99 Ultimate Victory RC, which could regularly be found for less than $10 early in the season, started rising in value as the year progressed, averaging around $19 TAC in July, $24 in August, and then back down to $19 in September (despite going 4-1 for the month). Then came October. It averaged $30 for the month, with one sale going for $43.50 TAC after Boston won the World Series. His 00 SPx Auto #'d 1500 has also been a hot item. This card, which by the way is not his RC card, could be bought for around $40 at the end of the regular season. It averaged $68 in October, and I saw one sell for $162.50 on 10/28! I'm thinking that one was probably a glitch (either multiple bidders got carried away, or an inexperienced buyer didn't know the market), but still!
Now is not the time to buy Beckett's cards. They're probably either at or close to their peak, so if you didn't already buy, you missed the boat. You might want to look into picking up another Red Sox pitcher, who missed the post-season due to injury; Clay Buchholz. His 05 Bowman Chrome RC has dropped a lot since hitting a high of around $25-30 after his no-no. You could pick one up this month for $10-15 TAC.
*Interesting Boston Fact: When Babe Ruth was pitching for the Red Sox, he had a World Series record of 2-0, with a 0.87 ERA.