Find out where to buy gold & silver coins and bullion in Houston, Texas. Learn more about some local gold & silver coin shops in the Houston area. Houston Coin and Bullion LLC is comprised of numerous talented employees, including rare coin researchers, precious metals advisors, and in-house. Houston Coin & Bullion. likes · 1 talking about this · 1 was here. Houston Coin and Bullion offers clients the highest-quality rare coins and.