You do know that if you have paid phone off at T-Mobile, You can have them unlock it for you with just a phone call and answering a few questions?!!!!??
Can't leave feedback until an auction has ended (between the buyer & seller) and the item has been received. Then buyer has to click a button for "Item Received" - then they can leave feedback.
No problem. We were all newbies at one time or another .... LOL. Here is a link to how Listia works and the Rules for both buyers & seller - has a lot of good information so you will have it for your info: https://www.listia.com/rules.