posting from phone and having problems. bare with me. long story short: found what appears to be a marcus miller 4 string in a pawn shop for a ridiculously cheap price. looks and plays perfect. has the sig on the headstock, chrome pu cover, BA 2 bridge, everything. serial number dates it at mid 80's? whats going on? cant do pics. will try from a pc when i can. the sn is B010133. input would be welcome. thanks