Yes, this will effect garage sales.
A LA Times story said that the rules will affect garage sales and clothing sold on ebay.
http://news.google.com/nwshp?hl=en&tab=wn&ie=UTF-8&ncl=1286740389
When I read this thread, I immediately thought this was a hoax (no offense to the poster). After googling the story, I found out that it is true.
No problem. I thought it was a hoax too. I went through at least an hour of research before posting it.