I just looked up the stats and history on this home and it shows that it went new on the market on 3/25/09 for $195,000 and sold on 5/22/09 for $185,000. There are no records on the multiple listing (MLS) that show it sold pryor for $50,000. It was however withdrawn and cancelled from the Multiple listings with a Realty Firm on 10/9/08 which would be right around the time it shows that it sold for the $50,000 (11/08) on Trulia.
I have not experienced this extreme low pricing even with bank owned and forcelosure property in any area of Portland really unless it is a very small Condo or a mobile home. Hope this helps and feel free to contact me with any questions on properties you want more information on.
Prudential NW Properties
5 Centerpoints Dr., Lake Oswego