Lowe's offers the Stanley 6-Piece Variety Pack Screwdriver Set, model no. 60-060, for $4.98. Opt for in-store pickup to avoid the $5.99 shipping charge. That's the lowest price we could find by $4, outside of the mentions below. It includes 4" and 6" standard, 3" and 6" cabinet, and 1-point and 2-point Phillips screwdrivers.
Close prices: Via pickup, Home Depot offers it for $5.13 while Walmart has it for $5.24.