Hi, i read your description and looked at the images you attached, i see you need a customized windows app that you can use to display live auction info on an external display with the ability to change the info in realtime from the pc interface. just like your own smaller version of presentation software.
I can get this done for you very quickly, am a well seasoned developer with over 8yrs experience, you can be assured a job well done.
Would be great to hear from you so we can discuss better.
Cheers.