Qi Tian found such a price quite vexing. He could indeed pay one million low-grade spirit stones. The last time he was in Wanjie City, he had slain several butchers who had attempted to kill him. He had seized a large number of spirit stones from them, which he hadn't really touched since then. Now, if he were to really use them, plus the other gains he had made elsewhere, he wouldn't have any trouble getting a million low-grade spirit stones together.
However, Qi Tian didn't do this. For one thing, he wouldn't risk nearly his entire fortune on just one flying sword. On another hand, he wanted to keep some spirit stones for his future cultivation. But neither of these reasons was the main issue. The reason he didn't dare to do this was that he wasn't sure if there were any special marks on the spirit stones he'd taken from the butchers. If there were, spending those stones recklessly in Wanjie City would only invite insurmountable trouble for himself.