What price and from where first of all, beware of the many scams out there, as these are quite hard to come by often a good price plus in stock is a little bit dodgy. Also have in mind that Dragonmint will release a 16th miner in the next few months which will be more profitable than the s9 currently is. However if bitcoin rallies again to over 20k then i can see the s9 still being profitable for a while but to know fully i would have to know the price your going to pay to know whether it makes sense or not. Also calculate import fees if it is from China.
My friend has been supplying textile equipment directly from the manufacturer in China. From which province do not know exactly. Price is about $4000 including all costs.