"Average" is what kills a meaningful answer to your question. If a home doesn't have anything spectacularly unusual about it, is in good condition, and has not sold in 30 days, it is over priced. There are lots of sellers who won't believe that it's the market, not them (and not the realtor) who sets the price of their home. "Average"" includes homes that have been on the market for a year without meaningful price reductions. To find the market price today, listen to your Realtor's CMA numbers. Price it at market. If it hasn't sold in 30 days, lower the price by 5%.
In July, the average detached Portland Tri-county area home in a "traditional" (not REO or Short) Sale sold for 94% of list. Why not price it right and sell for 100% of list (or more if it generates multiple offers).