You can get a far better speaker than the WP 7 for the same money.
I have posted here before this same information, but it bears repeating, there are many smaller audio companies which are producing world class products that can outperform many of the brand name products for less.
I am an Usher dealer and they make a $16,400.00 speaker which is a direct competitor to Kharma, Avalon, Wilson etc.
A Be 20 is a true reference grade speaker and it is affordable this is especially true, when you consider that the speaker uses a pure Beryillium tweeter and midrange, as well as two 11 inch Eton woofers. Combine that in a cabinet which is 300lbs of solid birch,mdf, and damping materials you have a speaker which can compete with any $30,000.00 plus monster! I have heard them, I have installed them and yes they are that good!
Before you venture into a used WP consider the Usher's you might be very, very surprised!