Done selling on eBay, they are demanding my social security number to sell

Sorry, I misspoke, checked a payment and you are correct.

Everyone please note that while eBay charges the buyer the sales tax and collects it from them, PayPal charges YOU the seller the PayPal fee on that sales tax that eBay collects in your transaction but which you don’t receive. I don’t know how this all works with eBays new payment methods. But I have had it with selling on eBay and nearly so with buying big ticket items on eBay. Let’s all support our non-eBay audiophile aftermarket marketplaces! 

I think eBay had figured out a way to stick sellers with the tax so they don’t have to deal with it. Why else would they want our SS#? I’m 

Why else would they want our SS#?

so they can report your income to the IRS. Until recently millions and millions of dollars of goods were sold through eBay and other sites without any sales tax being collected and without the profits being reported as income. The seller could easily run a business on eBay and evade paying any taxes. The buyer could avoid paying any sales tax.

That has changed now.

With managed payments, PayPal is out of the chain except if the buyer uses it for payment. eBay now manages all the payments including collecting the appropriate sales tax for each state from the buyer. I live in a state with no sales tax, however this came from eBay's site:  

"If you're required to charge sales tax, you can set up a tax table and apply it to your listings. We'll then add the tax to the buyer's total at checkout. You're responsible for paying the sales tax to the appropriate authority.

Contact a tax professional to determine whether you need to charge sales tax on your eBay sales, or if you have questions about any other taxes. We can't provide tax advice or guarantee that our sales tax features meet all tax requirements."