Respectfully disagree. They WERE mid level bourbons, but things have changed. Westvleteren 12 WAS a ďmidlevelĒ beer brewed by humble monks, but rose to the status of best beer in the world...why? Low supply, high demand, hype, and people finally discovering it. Same could be argued for the Weller bourbons.
Furthermore, it would be a shame if products like bourbon or beer were forever destined to stay in whatever class they were initially introduced. I think itís cool when products climb the foodchain, so to speak. Worth is subjective, but IMO the Weller bourbons are worth more than current state mins.