Two days after Amazon.com ran
a flash sale, eBay is doing the same. Amazon offered $8.62 off on a $50 purchase, while eBay.com is offering $10 off on a $50 purchase.
Amazon's sale excluded third-party merchants - only purchases from Amazon.com applied.
On eBay, shoppers must use PayPal to pay, and there are some excluded categories ("Eligible items exclude items from the Coins & Paper Money, Gift Cards & Coupons, and Real Estate categories"), but otherwise, third-party sellers benefit from the sale.
It runs through 6 pm PT (9 pm ET). Here's a link to the promo page
Let us know if you've seen any boost in traffic or sales, and if you're planning to do any buying.