After I gave my pin to my daughter at her initiation this fall, the fact that I didn't have a pin any longer really bugged me. Mine was the style with the pearls, but I couldn't justify spending $200+ for a new one. I kept watching E-bay and bid on several badges in Nov. and Dec. Just before Xmas, I WON! My new one doesn't have any engraving on the back, but was supposedly purchased at an estate auction very close to where I live (Chicago area.) It is a plain badge, but I was so excited to get it for just $26.
So, hopefully some of these Theta badges are being scooped up by people who really will treasure them as much as the original owners did.