1. MB1260 XL-MaxSonar-EZL0 High Performance Ultrasonic Range Finder - $50
2. Ardupilot Mega MinimOSD - $60
These prices are shipped via USPS priority CONUS. If you buy both I'll knock $5 more dollars off for a combined price of: $105.
After selling my APM 2, I realized I had a few other parts left. I am keeping my current, basic Ardu Quad, but moving on to other projects.
Thanks for looking.