Kurt Cobain's Acoustic Guitar From br 'MTV Unplugged' Set for Auction Bids on the 1959 Martin D-18E are br expected to start at $1 million at the online br 'Music Icons' sale hosted by Julien's Auctions. The auction will take place br between June 19 and 20. The winning bidder will also get br the guitar case Cobain used, which has a poster of Poison Idea's br album, 'Feel the Darkness,' on it. The case br also contains guitar strings and picks.