Sourcing Second-hand Testing Instruments in Germany -- 2

Please note that below task is only available to local Germans and long-term German residents. I need help tracking down reliable, fairly-priced, second-hand test and measurement instruments here in Germany... (Budget: $10 - $30 USD, Jobs: Business Development, Data Collection, Inventory Management, Lead Generation, Market Research, Sourcing, Supplier Sourcing, Supplier Verification)