You should be concerned, everyone should.

"Is there a club position on mentioning repairs during a sale?"

Yes. Do a search for President Skeltons posts on the club BB.

"Am I safe if I buy from Club Members only???"

NO! Club members are the ones having the chips repaired. They are greedy and no not care about the harm they are doing to the hobby.

"Does the Club or TheChipBoard site keep a register of Ebay sellers to avoid?"
Not that I am aware of.