A sheep market survey was undertaken in nine key Ethiopian Central Highlands markets in 1989 Data relating to animal(sex, age, condition, breed, weight, color) and market ( price, purpose of buying time of buying buyer type, seller type) characteristics were recorded. Two rounds of sheep traders' surveys were also undertaken during the same year. The shall a market was selected for analysis because it was possible to record time of sale more accurately than in the other markets. The results of the analysis suggest that the time of day of sale did not affect the price of sheep when the sellers were predominantly urban resident traders. It would be desirable to inquire whether this result would remain unchanged when large number of itinerant traders also attend the market.