I have sold on there many years. He doesn't want the ebay sellers to know he is buying for resale, so in giving this kind of feedback he thinks he is throwing them off track. Most ebay sellers don't care but, some don't like it if they think someone else is going to make a profit. jmo
Given that the cars are for: grandchild, grandaughter, grandson, child and collections (like the one on surburan drive, I guess) I think you are right - he is just acting 'normal' to make the sellers think he has grand kids.
Wait, wait -------------> WAIT -----> I GOT IT -----> It is because the foundation ̶W̶A̶S̶ ̶ is for advocating for grandparent rights. So he will say, technically he is using the b̶l̶o̶o̶d̶ ̶m̶o̶n̶e̶y̶ funds for the stated purpose.
:banghead: I STRONGLY DISLIKE THEM ALL!
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