Okay, point given, but this is mediocre at best, why would you consider such high prices for characters? If by anything, you promote buying your own gear on the Marketplace rather than people utilizing your Character Trading service.
What I can do for a suggestion is a suggested market price for the character, with no bars or limitation of how low or high you can go, make it work like an Auction House as well, it will improve trade, revenue, etc.
If, like what you said, character trading goes awry (account hijacking) then you'd have the entire log for it.
The % cut as well is too much as well..
I'm pretty sure what most players (including me) are getting at, is that the current pricing for Character Trading is too unreasonable and too unrealistic..