Bank transfer/electronic fund transfer is the best way.
KC has Bank of America so if you also have a BoA account the transfer is free/super easy.
KC is a great seller and he's treated me right with these past three (Vewlix FC, Vewlix Diamond, Vewlix Diamond Black) deals, buy from him with confidence.
I traveled from AZ to Cali to take a look at his selection of arcade cabinets. Real down to earth and honest seller. I bought a New Net City off him and the picture quality on the monitor is beautiful. No burn in or anything like that. I 100% vouch for KC if you were to buy from him.