Please look at how old the thread you are about to respond to is before you respond to it.

What to pay attention to
- Look when the original post was.
- Look when the last comment was posted to the thread.
- Look at the member that posted the thread. Does it say member or guest?
- Look when the seller was last active on the forum

What to do
-PM, Email, Text the seller to ask about the part
-Post a WTB thread
-Look for an active thread with what you want

What not to do
-Post "Do you still have XXX" or some version of that