Dear Customer,
Thank you for contacting G2A Digital Marketplace Customer Support. G2A is a marketplace where Customers have a wide range of products offered by independent sellers.
It seems the Item Trade in Your order could not be initiated. It may have happened for various reasons.
Make sure your trade possibility is not restricted. Possible reasons of trade-lock on a Steam account can be found under the following link: https://support.steampowered.com/kb_article.php?ref=1047-edfm-2932
Current trade possibilities of your account can be easily checked with a simple quiz: https://www.doctormckay.com/utilities/canitrade.php
Please let us know about your decision in the reply.
With Best Regards,