I collect them for collecting. I wouldn't want to part with any of my
autographs. There are some duplicates I have, that I MIGHT be persuaded
to sell, but not many.

I certainly don't go to cons or events with the intent to get
signatures to sell.

But that doesn't mean it's a bad thing that others do it. Sometimes
there is no other way to get an autograph, and I have to buy it from a
dealer.