Thank you for the reply, I saw some postings earlier in the year about interest in S9, let us see if any one is interested to buy especially that the price is on an upswing.
You might get some buyers for those PSUs in the global Marketplace>Computer Hardware section.
The S9 is no longer profitable to mine with like what deadsix said and thus you are at a loss if you bought them hoping to mine some bitcoin with it. Sadly this is the current scenario of the mining niche because race for the new hardware cripples ROI of the older hardware.