Retaining Wall Structural Assessment -- 2

I need a professional to assess the structural integrity of a stone retaining wall. The wall has some visible displacement of stones and I want to ensure it's safe and stable. This is to help me decide whether to buy the property The wall is in Stirling, Scotland... (Budget: £250 - £750 GBP, Jobs: Building Regulations, Building Surveying, Civil Engineering, Construction Monitoring, Risk Assessment, Site Inspection, Structural Certification, Structural Engineering)