I can't remember what I paid for my set, which was bought as a non-attending member set, but I have a feeling it was slightly more than what you paid now, almost 5 years later.
Nice catch!
*And enjoy them. I still prefer Botcon Dirge and Thrust to the later releases, and I am extremely happy with the different Thundercracker, who was my main reason to get the set in the first place. Dreadwind is great, and Bugbite is........well, a non-entity to me.