Thank you for submitting your item for appraisal. Based on the information you provided this appears to be a Buffet R-13 b flat clarinet with case, apparently in good condition. There appears to be a little wear to the nickel silver, traces of use as you would expect. There are cheap chinese copies around which have a negative influence on prices. The instrument in your possession seems to be an original. The estimate is based on auction results, "asking prices" in the trade are usually higher.