Vintage 78 rpm RAGTIME records wanted

If you have early Ragtime records for sale, I will pay collector's prices for rare items. Emphasis is on band recordings (Pryor, Sousa, Prince's ... and the more obscure ones of course). Banjo and other instrumentals also welcome, but mostly of secondary interest. Also very early 1917 - 1920 jazz records wanted (Memphis Pickaninny Band, Ford Dabney, Jim Europe and the kind). I collect internationally, i. e. not only US recordings, but worldwide Ragtime of the period (ca. 1896 - 1920)