By Simon Mullock Tickets for Liverpool’s crunch Premier League clash with Manchester City are selling for a staggering £6,500 on the black market. And punters will have to stump up for two seats if they want to land prime positions in the lower tier of Anfield’s Main Stand for what could be the final showdown between Jurgen Klopp and Pep Guardiola \- landing them with a final bill of £13,000. Tickets for Anfield usually sell for £60 – but ticket resale sites are making a fortune by hiking up the prices to bank-busting levels. The game is set to have a huge impact on the outcome of the title ra…