The current solution for the BACK BUTTON is misleading when accessing a listing from the main marketplace link.
This is because you are not returned to the original page but to the member's personal Marketplace page instead of the Main Marketplace from where you came. This confuses me and also my community members. I would like to encourage you to improve this problem. As a solution it would be possible to offer two buttons in the Listing Details pages with clear descriptions:
1) Back to Main Marketplace
2) More Listings from the user