Open Buy Window [0x74]

Open Buy Window (Variable # of bytes)
BYTE cmd
BYTE[2] blockSize
BYTE[4] (vendorID | 0x40000000)
BYTE # of items
# of items worth of item segments
        BYTE[4] price
        BYTE length of text description
        BYTE[text length] item description

NOTE: This packet is always preceded by a describe contents packet (0x3c) with the container id as the (vendorID | 0x40000000) and then an open container packet (0x24?) with the vendorID only and a model number of 0x0030 (probably the model number for the buy screen)