Absolutely true. somewhere, I even have an email response from ebay customer service stating this. Took a loooong time for her to admit it, she tried saying well there's no protection, blah,blah.
You can't see why? Convenience, convenience, convenience. Coin shops around here are few and have extremely inconvenient hours for people who work from 9 to 5. My family life is too busy -- I usually can't get to coin stuff until 10pm or later on a weeknight. The nearest coin show is an hour from here -- two months from now. Where else but the internet can I make a purchase at midnight, sitting comfortably in my living room? I know it's not for everybody, but I'm surprised that you appear to think that it's not useful for anybody ever. E.g., I have a gazillion holes in my Indian Head Cent collection (as I only started that a year ago). Last week I picked up a bunch of 20 IHC's for $20 (ppd). It filled 10 holes and a few of the coins were nice. A few of these kinds of purchases -- and now I only have half-a-bazillion holes! <g> Last week I got a 1945-S Walker Half, in F/VF for $7 (ppd). I also got a 1909 IHC for G for $3.50 (ppd) (graysheet lists the coin for about $12 -- I got it b/c I took a chance on an auction that had a bad-quality picture, and I guess others didn't want to take that chance). I just picked up a set of 2001-2009PD Unc set of Sacs (20 coins) for $35 (I see same sets online selling for twice that). Ya' just gotta be careful and know what you're getting into. It's just one place of many where one can purchase.