Believe me, it kills me to shovel thousands of dollars to TPA's every year. Especially when I am 100% confident that every item I am giving to them is authentic or I would not have bought it to begin with. But on the other hand, I also want to maximize the potential value of each item. And in my experiences, I have been able to do so much easier when I use a TPA as well as give my own personal Guarantee and COA. And the investment into TPA does come back to the dealer when the item is sold. So I really just don't see why a dealer wouldn't use one, the buyer is paying for it anyways. It attracts more buyers than without. And dealers like buyers...The more the better.
This is the biggest fallacy out there, it is simply not true. If it kills you to shovel thousands to TPA's, then don't do it. I don't do it, I sell just fine. So do lots of my friends. You will just get more serious bidders who look for quality items and know what they want and know a good autograph when they see one, rather than some guys who just buy the cert. The autographs still sell and for basically the same amount of money.
I have sold autographs that normally go for 420 dollars with tpa cert, for 400 without one, and the cert would have cost 75 dollars, so if I would have got the cert, I lose 55 dollars, but I can make it up in volume I guess.