i'm pretty sure its this bit, ensure it has mail green true, and sell green false. but i think if sell green is false, it wont sell quest rewards/things that were upgraded?
<MailGrey>False</MailGrey>
<MailWhite>False</MailWhite>
<MailGreen>True</MailGreen>
<MailBlue>True</MailBlue>
<MailPurple>True</MailPurple>
<SellGrey>True</SellGrey>
<SellWhite>True</SellWhite>
<SellGreen>True</SellGreen>
<SellBlue>True</SellBlue>
<SellPurple>False</SellPurple>