The 1994 Bowman's Best Baseball card set is still very affordable for the regular cards, not including the refractors. The three key rookie cards in the set are as follows: Jorge Posada rookie card (#B29 and it easily is the best card in the set), Billy Wagner's rookie card, and Edgar Renteria's rookie (#'s B19 and B63, respectively). If it had more of a rookie card selection, which it lacks, it would be even better. It is a great box, or unopened pack to leave unopened and a great set to have. I have a complete set of 1994 Bowman's Best baseball cards, and I think it is undervalued.
Here are some of the key cards in the set. #R71 Cal Ripken, #R37 Roger Clemens, and #R81 Mike Piazza. MBS Grading and mybaseballcardspace has one currently listed on Ebay.