Mystery Triumph

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Title info:    1972     Serial number: T120RVCG51184
 Make:  Triumph
 Cost: $200
 Condition: Poor
  Has good compression, all chrome and magnesium parts corroded, handlebars are "ape hangers", need sideplates,  seat, gas cap, god knows what else....Should I buy her?  I already own a 2005 Bonneville America, and a 1981 Honda CB 650.....
  Can I get parts for her, are they expensive, good resale value?  Junk or Jewell?   Thanks for the advice.