If I was selling your equipment I would list it all individually and the power supplies individually on ebay and have buy it now prices on everything for as low as you are prepared to go (taking into consideration ebay fees). I know its a pain doing multiple listings but I honestly think it would be your best bet.
Most people would buy one or two miners and might already have psu's. By selling it all together I think you're putting off the majority of your potential buyers.
Also offer collection as well as shipping options.
Hello! i do have one listing here on BTCtalk where i sell it all individually
might place it on Ebay tho thanks