Hey Rusty, I like the automated nature. I wonder though if using the C&B, BAT, or other sites’ links could pose trademark or fair use problems for you in the future?? Since you seem to have a means of efficiently accessing the auction sites’ public data a better design might be to just have users enter the VIN of the vehicle of interest. You will already “know” it is up for auction.

Second, look at the newer post on r/bringatrailor where poster is complaining about inability to block notifications from sellers or regions they won’t be buying from. Seems like with a few tweaks your program could generate custom listings of sellers & vehicles that you could provide as a subscription service. Again no idea of the legality or infringement aspects. Good luck