I am sure everyone is aware that we will very soon not be able to use USPS Priority boxes on Poshmark. (Sept.12) If I had the space I'd get boxes for free and break down. Then you deal with boxes of all different sizes and it becomes messy. I will be using my Ebay coupon to buy boxes but with 4th quarter upon us I will probably get rid of all the USPS boxes and take back to the post office. Then stock up with boxes to use on Poshmark. I will use polymailers for most items but I do sell bundles and sometimes high end shoes that need a box. Looking at Grainger and Uline but I'd be paying $1 a box. Does anyone have any other ideas besides dumpster diving? I am saving boxes but it won't be nearly enough for 4th quarter. My sister went to USPS today and the employees have never seen free ground advantage boxes and this is in a major city. We will hopefully see them next year but that won't help in 4th quarter this year. Thoughts?