According to Baby Cheapskate:
You will no longer be able to place used children's clothes or toys into the "stream of commerce" unless you can prove that they've been tested for lead and pthalates. As I and others understand it, that means no selling items without such proof on ebay, Craigslist, yard sales, and church/organization consignment sales (See if your favorite sales are still scheduled). Of course, that means no buying kids' clothes and toys without certification from these sources either. This act could easily triple the amount that many families pay to clothe their kid until there are enough second-hand items manufactured after Feb. 10 to replenish the second-hand market (and even then it's likely that prices at thrift stores, etc. will be higher due to the added cost of testing them). It will absolutely eliminate the notion of recouping any of the cost of older items through reselling.
Stinks, no? I know that we depend a lot on second hand clothing and toys to help eliminate costs and also to prevent the useless manufacturing of more toys when there are so many toys out there that have been hardly used. (Not to mention, vintage toys like Little People are SO MUCH COOLER than the current day toys).
While I understand the aim for safety for kids, this goes a little too far in the wrong direction.
I'm still in the midst of researching and finding out more about this new law, so if you have more information, please let me know. Meanwhile, if you're of the mind to help support thrifting and resale shops as well as preserving your right to sell used children's items as you're able, post about this and contact your local lawmakers.