Wanted: Cinder blocks in the Portland area

I’ve been cleaning out a space in my back yard to build a small bowl under two giant pine trees, so it’s got to be above ground. If you know anybody looking to get rid of some cinder blocks (for the retaining walls), please let me know. I’m on an extra tight budget. Yes, Craig’s list. I know. This project will come together as I am able to accumulate materials, there is no schedule. I figured it was time to put up or shut up. DIY or die!