I went to a reputable(?) tile store over the weekend and the salesman told me about marble tile that has been sealed in the factory. He said it is very popular and costs less than regular marble but about double the price of porcelain marble tiles since it is a natural stone. Has anyone heard of this or has had experience with these tiles? I posted this on the bathroom forum but only had one response. I am interested in marble but am not sure if I want the continued upkeep and cost. Thanks for helping.