That is the part of the history of music. The big names in music-business had been bootlegged in the past and in the present time, on vinyls or on cds, Elvis, Beatles, Stones, PF, Led Zep, Springsteen and, of course Dire Straits and Mark Knopfler. That is the business behind the business, with the bootleg-records in general. Most of the DS or MK-Bootleg records have a very good sound-quality and some of the collectors like to have them in their collections, as CDs or as Vinyls.