Walmart offers Schylling Large Alphabet Blocks 48-Piece Set for $24.09. Opt for pickup to lower the price to $17.01 (Amazon charges the same for Prime members). That's the lowest price we could find by $14. This solid wood set comes includes a storage box with a sliding lid.

Update: It's now out of stock at Walmart; however, Amazon still offers it for $17.01 with free shipping for Prime members.