There is sobering news Wednesday afternoon from online auction giant eBay (EBAY).

For Q3, the company posted revenue of $2.12 billion, consistent with previous guidance of $2.1 billion to $2.15 billion. Non-GAAP profits of 46 cents a share were above its forecast of 39-41 cents, apparently due to a lower tax rate, which was 17% in the quarter, down from 22% in Q2, reflecting “changes in the estimated geographic mix of the company’s taxable income for the year.”

But the outlook was not good, not good at all.

For Q4, eBay sees revenue of $2.02 billion to $2.17 billion, which is way below the Street at $2.43 billion; the forecast suggests a modest decline on both a sequential and year-over-year basis. (A year ago, revenue was $2.18 billion.) The company sees EPS for the quarter of 39-41 cents non-GAAP, below the Street at 42 cents.

For the full year, eBay now sees revenue of $8.525 billion to $8.675 billion, down from its previous guidance of $8.8 billion to $9.05 billion. The company now sees non-GAAP profits for the year of $1.69-$1.71 a share, down from its previous forecast of $1.72-$1.75.

eBay shares, which fell $2.41, or 13.6%, to $15.33 in the regular session, are down another $1.93, or 12.6%, to $13.40 after hours.