Used cars for sale Sitemap Illinois Harrisburg, IL Buick Buick Sitemap in Harrisburg, IL Used Buick in Harrisburg, IL by Model Used Buick Enclave Used Buick Encore Gx Used 2026 Buick Encore Gx Used Buick Envision Used Buick Envista Used 2026 Buick Envista Used Buick in Harrisburg, IL by Price Under 30,000 Under 35,000 Under 40,000 Under 45,000 Under 50,000 Under 55,000 Under 60,000 Under 65,000 Under 70,000 Under 75,000 Under 80,000 Under 85,000 Under 90,000 Under 95,000 Under 100,000 Used Buick in Harrisburg, IL by Style SUVs