Source Used Rohde & Schwarz and Keysight Equipment in America

Please note that below task is only available to local Americans and long-term US residents. I need help tracking down reliable, fairly-priced, second-hand test and measurement instruments here in the United States... (Budget: $10 - $30 USD, Jobs: Data Collection, Electrical Engineering, Electronics, Google Analytics, Market Research, Project Management, Research, Sourcing, Supplier Sourcing, Telecommunications Engineering)