Ticket scalpers are looking to make a killing on Dolly Parton’s 50th Grand Ole Opry Celebration on Oct. 12. More than 100 tickets for the two shows (7 p.m. and 9:30 p.m.) are listed between $1,000–$5,000 on StubHub, with one seller outrageously asking $14,587.69 for a main floor ticket (there are still four tickets available…