You might just have to spring for a pair from KEF Direct for $299.99 shipped, then have better luck selling the extra one than finding a co-buyer.
At least that way you find out for certain that it works well and if not, it's a LOT easier to sell a pair than a single. Or you could save your pennies and get the Q200c for $399.99 while it's on sale. Or find a used one.
KEF R500, R200C, R100, R50, SVS SB2000 sub, NAD T758v3 AVR, LG UP875 4K BlueRay, Samsung UN55JU6500F 4K LED TV, KEF M500 headphones, Sony CDP-CE500 CD changer. Office: NAD M10, KEF LS50, KEF Kube 10b, Pro-Ject RPM1 TT w/ Ortofon 2M Red.