The east African nation is the world's largest exporter of black tea, an important source of foreign exchange for it.
Africa Tea Brokers (ATB) said in a market report the Best Broke Pekoe Ones (BP1s) fetched $2.65-$4.82 per kg from $3.00-$4.80 per kg attained at last week's sale.
Brighter Pekoe Fanning Ones (PF1s) sold at $2.00-$2.68 per kg, compared with $2.08-$2.75 per kg at the last auction.
ATB said there was less demand for 118,979 packages offered for sale with 29.4 percent unsold. Last week, about a quarter of all packages, or 6.97 million kgs on offer went unsold.