Rare Transformer

This toy is, I believe, a 1987 Transformer. It is a rare US Customs Sample, meaning (if what I am told is correct) less than a 100 were made, and most of these were destroyed as was policy. This one survived by being taken home by an employee, and fell into my hands. It is a decepticon, n amed horri-bull, in near mint condition still in package, with the official "US CUSTOMS SAMPLE" logo clearly etched into it on the top. It's US/Canada toy, so the package is authentic in both English and French. It comes with a Prof. "KREB" trainer as well. I'm looking for any help in appraising this toy, and I'm interested in selling it for the right price.