This is a little rant. For instance, if you’re selling a dark watch sword (V) and are buying blue monarch wings, I’m sure most (if not all) of us would appreciate it if you could phrase the title something like : Sell DWS (V) & Buy blue monarch wings.
Unless you have too many items to fit in the heading, I personally hate the ambiguity in some threads.
You may be phrasing it vaguely to garner more views, but honestly a more concise heading will attract those interested and those uninterested can scroll on down. In fact, might I argue that you may find a buyer/seller much sooner if you keep it to the point

Let me know if I’ve left anything out. Thanks.