While I hate eBay, they have a very good point this time around. This year, congress is really trying to push for an internet sales tax, meaning online sellers would have to collect tax for states they sell in as well as the state they reside in. This is absolutely ridiculous, especially as many of the items sold online have already had tax paid on them when they were purchased the first time.
eBay has a very nice form that you can fill out and it will automatically send a letter to all of your state representatives. It's
here if you would like to fill it out and keep online business as open as possible.