Posted By:
Steve MurrayJeff is correct. Change your ID and everything else remains the same. Feedback, time joined, etc.
The little symbol that looks like a fish bowl next to all the others following the feedback is notice that the ID has been changed. It stays there for 30 days.
If you put pcj212 into your seller advanced search it will pop up tywagner1223.
Funny as to why he would want to change his ID after so many years. 
Oh, I forgot, you can also check ID History and it will show you the date the ID was changed. Ergo, my post.