Actually the price is not that different. My method of buying imbuements was by creating several buy offers, which was hard to track the prices at the end. But you gave me an idea of making the estimate using the gold token price, at least for (void/vampirism/critical). Assuming gold token to be in the range 33-38k, the cost of each imbuement will be 5-6k for basic and 9-10k for intricate.