Can I revert my page back to NOT In Trade, not selling much on it these days and the fees are too high at In Trade

Kia Ora Rita,

You can't convert a Business In Trade account to a Personal account though you can have both an In Trade and a Personal account. - In Trade accounts are locked in. 

Refer to article One Trade Me account to rule them all? | Trade Me

If you require both a Business & a Personal account you are requested to run permission through TradeMe first - Cheers.