My issue with GB is not the auction prices. People can set prices however they like, and people can bid as high/low as they want. Don't like the price, don't bid.
The issue is their poor and even confrontational customer service, which can border on the abusive towards bidders, and just about always leans towards the seller. But that may just be my own experience, which included losing a password for an old account (with a dead e-mail address), creating a new account, and getting terminated from GB for "having multiple accounts".