Is this bottle of wine valuable??

[angeleyes0717]

I have a unopened bottle of Brolio Chianti Classico Casa Vinicola Barone Ricasoli 1985. It has not been opened and it still has the seal which reads AAF 01879890 CHIANTI.It also has what appears to be a bamboo wrap around the bottom. Is it worth anything??If so does anyone know how much?? My best friend is getting married and I thought a nice bottle of wine would be a great gift, but I don;t want to give her something if it isn't worth more than 10 or 12 dollars..