Basically, you saved $10.00 by getting the PLP, versus buying the 4 of them individually. By comparison, you only saved $3.00 by buying both
Super-Griffins together.
On or about week of August 26th, 2013...
20-5076 TDR-1C Thunderbolt Mech (XTRO Primitives III PDF – 65 Tons) $13.50
20-5077 LGB-0C Longbow Mech (XTRO Primitives III PDF – 85 Tons) $15.50
20-5078 WSP-1 Wasp Mech (XTRO Primitives II PDF – 20 Tons) $9.50
20-5079 BNC-1E Banshee Mech (XTRO Primitives II PDF – 95 Tons) $16.50
That comes to $55.00, versus the GC Exclusive PLP which was only $45.00. So you can look at it like you bought the Heavy and 2 Assaults, then got the Light for free. :D