I'm pretty aware of his defensive presence and I probably watch more NBA games (including Boston) than the average die hard NBA fan. I watch just about every game (not just the Spurs).
I'm also aware that PER isn't a good measure of a players defensive presence, but that still doesn't justify your premise that his market value is worthy of an All-Star in return. That's crazy talk, tbh. Only subjective pro-Celtic fans would agree to that, tbh.
Like I said previously, I never said Avery Bradley makes sense for a potential Boston/SA deal, I just simply pointed out how his skill-set would fit a need for the Spurs and that it's obvious that the price for him would be too high for what the Spurs would probably initially offer (De Colo or Neal/Blair).