I was planning to attend WorldCon in Kansas City next month but I've had a long conversation with my enlarged prostate and the result is I won't be going. So I have an attending membership to sell.
In fact, such is the appalling state of my memory these days that I recently discovered I have two such memberships, since I apparently acquired a second one about two months after I bought the first.
The current rate for attending memberships is US$210. Any reasonable offers will be accepted.