This excerpt taken from the EBAY 10-K filed Feb 17, 2010.
The current recession could harm our business.
Our Marketplaces and Payments businesses are dependent on consumer purchases. The current economic downturn has resulted in reduced buyer demand and reduced selling prices and may reduce the volume of purchases on our Marketplaces platforms and the volume of transactions paid for using our PayPal payment
service, all of which would adversely affect our business. In addition, an economic downturn will likely adversely affect our advertising revenues and continue to require us to increase our reserves for bad debt and transaction losses. In the event of the bankruptcy of a merchant that sells goods or services in advance of the date of their delivery or use (such as airline, cruise or concert tickets), PayPal could be liable to the buyers of such goods or services either through its buyer protection program or through chargebacks. Continuing poor economic conditions will likely continue or exacerbate these trends.