The prices in the AH are ridiculously high.
Like the first Scouter you get when you create your character. If you lost it and you want it back, you can buy it at any Scouter Merchant for 1,550 Zenni. At the AH they sell it for 5,000 and 10,000 Zenni!
Now the Quest Chip. You get it as reward of a Quest and you can buy it at any Scouter Merchant for 15 Zenni. Now look at the price in the AH.
25 million Zenni!
And the Inspect Others Chip can be bought in West City at the Scouter Merchants for 15 Zenni. Here's the AH price.
10 million Zenni!
Why do they sell them for so much?