Four 1998 Silver Proof Sets, 90% silver, $3.40 face value of proof silver coins 17 May 2025May 17, 2025adminfourcoins, face, four, proof, sets, silver, value Proof sets are a great way to stack pristine 90% silver! This lot contains 4 silver proof sets. This is nearly 2.5 ounces of silver! Sets are complete, in OGP with COAs. If you like silver, be sure to check out my other items too.