Bikini Poster

Found this poster of a latina bikini babe in a roadside bar up in the mountains of Las Marias, Puerto Rico. The bar was owned by an 82 yr. old gentleman that said the poster had been there for so many years he couldn't recall its age. It is an advertising poster for Castillo rum. From the style of the bikini, with the sides high on her hips, it appear to me to be late 80's to early 90's. I tried to pick the poster but the old man said he liked looking at it too much...haha! Does any one know the approx. value of a poster like this? I know they wouldn't go for too much, but it does constitute a period in time. Also would it be more valuable if the circulation was only in Puerto Rico or Latin America?