Looking for marketing outlets for a large blues vinyl collection

Carmen Mungo passed earlier this year. He owned and ran Siccone's Lounge in Geneva, NY and hosted numerous live blues acts over the years primarily during the 2000's. These acts included Bobby Rush, Tinsley Ellis, Rosie Ledet, and Kenny Neal. His widow approached my wife recently about an appropriate outlet to auction Carmen's hundreds of blues LP's. Many of which are rare and obscure. Any help and suggestions would be helpful. Thank you in advance to the Audiogon community for helping a man who strived to bring the finest in blues entertainment to a small town.  -Scott