[drcy]

You could also try one of the smaller odd ball issues, such as 1957 Swift Meats, 51 Topps Red or Blue Backs, Spic & Span Braves, Dormand Postcards, one of the Red Man sets, one of the Amor Coin years. The 1954 Red Heart set might be a good one-- small set, big names including Mantle and Musial and the cards aren't hard to find.

The cards for all of the regular Topps and Bowman regular sets (though not the masters sets) are easily findable, it's just some are unusually expensive (numerous in the 52 Topps set clearly). The 57-59 Topps sets have no toughies, just are huge if you're collecting single card by single card. Though for all the regular sets, you can find good bulk starter lots to give you a good start.