Right now there's no way to know what was the historical minimum or see the price graph for a specific DRM.
Would be awesome to have this feature!
I can't believe I'm the only one interested in this feature.
Yes, I also believe this would be a good feature. Perhaps better would be if different DRM of games would be a separate listing altogether. For example: a listing for The Division [Uplay] and a listing for The Division [Steam]. That would also solve this.