How much would these 1987 unopened Topps baseball cards cost?

My friend has a pack of 43 Unopened 1987 Topps Baseball Cards featuring John McNamara (All Stars), Daryl Boston (White Sox), Joel McKeon (White Sox), St. Louis Cardinals 1987 Team Leaders (Topps 351), Ken Griffey (Topps 443), and Herm Winningham (Topps 614). The pack hasent been opened and my friend was curious as to how much the pack would value.