The POSH user interface doesn't look that different from the standard old proletarian Craigslist. In fact, it actually looks worse.
It's a deceptively humble aesthetic, using text descriptions to entice potential buyers. One glance at the prices illustrates just how big the gap between POSH and CL really is, though.
Believe it or not, POSH is very active and many of the offerings on it actually sell successfully.