Hi dustyvalentino, yes a very good point with that two albums.
Dire Straits - On the night had been released in some countries like UK, Spain, Brazil, Germany and Zimbabwe. I have a pristine unplayed version from Zimbabwe on the ZMC-Label (Zimbabwe Music Company Harare). I got it for a very reasonable price, and all other versions are totally overpriced, also for average condition copies in vg+ condition. That is very slippery.
Dire Straits Live on the BBC is a really rare record, to my experience, so that will be difficult to catch a pristine copy for a reasonable price, but On the night is not so rare as stated by some traders, because you can find it on ebay for example really often, but Live on the BBC is really rare.
Yes, it will be a very good idea to re-release that two albums on a record-store-day event. Maybe as remastered editions on 180 gramm vinyl. That will be a good deal.