The building which now houses the Oskaloosa Post Office is being put up for auction this week on the Internet website e-Bay. The minimum bid will be set at 300-thousand dollars, while the building and land are assessed at 550-thousand. The city is losing several thousand dollars every year by leasing the building to the federal government. The buyer would have to agree to a lease that would allow the post office to stay in the building for the next 30 years.