A comment was posted recemtly here questioning whether ECADA (CPSIA amendment) truly liberates the resale industry from the CPSIA. In my opinion, it does. I have also conferred with the authors of ECADA for their intentions, and they confirm that resale shops are intended to be exempted under the new language.
The authors point to this language: "obtained by the seller, either directly or indirectly, from a person who obtained such children’s product for use and not for the purpose of resale". This language should give true resale activities, whether in a shop, in your garage, even on eBay, an exemption from all the requirements of CPSIA. What they didn't exempt is sales by liquidators. In other words, they did not intend to open a loophole in the protections (purported protections) offered to consumers under the CPSIA allowing mass liquidation of potentially violative products Otherwise, real resale activities are exempt. There are some limited exceptions in ECADA to the resale exemption notably.
Thanks for posting this question. I hope this helps clear up any infusion.