In the shop/bazaar it says the prize is 9.99 USD When converted to pound sterling it stays at £9.99 when it should go down to £7.83
~Questions regarding the prices is something that should be directed to Live Support as none of the forum members have anything to do with it or have the ability to alter it.
~This does not qualify as a "Bug".
~As previously stated by ElonMusk, prices are based on your currency conversion as well as the method / payment systems being used. In some cases there is an additional fee charged by the servicing agent.