[quote name='chiwii']Dafoomie is right about the IRS cracking down on people who sell on ebay, amazon, etc. (probably even farmer's markets, if they take credit cards). It has nothing to do with the states and sales tax. If a seller meets certain sales criteria (something like 20k in gross sales and 200 transactions), ebay has to file a 1099-k for that seller.[/QUOTE]
IRS form XYZ = Tacksez!!!
A 1099-K is an informational form for credit card transactions (3rd party payment systems, kind of a key part)
A 1099 only needs to be filed if one single individual receives a payment over $650 (another key part)
I won't get into the minutiae of this because heads will spin and eyes will glaze over. Here's a very simple version of what the "eBay 1099-K" actually means:
You accept a lot of paypal (3rd party payment), paypal pays the credit card company, charges you a fee and has to report that fee as earnings. 1099-K is how they justify those payments/fees. The IRS (which needs 50k new agents but only for Obamacare :eyeroll

assumes $x in fee based transactions will occur. See last sentence.
So 1099-K as an individual:
Oh

! Tackzezz!?!!!2@@
Nope. 1099 is informational, not a statement of earnings. As an individual you'll do a schedule C based on "potential" earnings from the 1099K but then write off the paypal/shipping/listing/etc... fees as loss of income and then reduce that by cost of goods sold.
If you really are a small business (
www.americanguitarbotique.com for instance) that does a large amount of transactions on eBay, then you're doing all of that filing anyway as part of your revenue reporting.
tl:dr
1099-K for eBay is a scare tactic.
So if anyone is very active in selling on eBay and the like, share your story of 200 sales or roughly $100 each went for you!
Back to my original point, this is federal govt helping local govt find revenue in the form of sales tax to reduce the local aid to the states from the fed govt.