i have bought many bosch batteries and one ac delco battery form wajid sons, he's the official dealer, i found his rates on par or just only slightly expensive locally, maybe you are looking at a different series of ac delco battery as there are a couple different variants which all will be available in 60amp. i doubt you'll be able to find a better rate,
btw are you sure that a 60AMP battery costs 180SAR? i doubt it, first 60amps is way too big for a vitz, you may just be reading the model number of a old local or hankook battery which say 60 outside but actual output is 44amps. i know for a fact that bosch s4 50amp battery costs 10-12k no matter which country you buy it, there no way a AC delco 60ampere battery could be cheaper