You can still get them for under $100, new, if you look around. The 275 price mentioned is for a limited edition model, not for the regular ones.
What you have is the date the handles were made, which is why they are sometimes different, as they were just randomly picked for assembly.
We usually date them based on the most recent date, unless there are other minor changes in the tools that some PST experts can use to date the tool more accurately.