Collected by date and mint mark, no Eisenhower dollar is rare, and a complete set may be acquired without difficulty. However, many were badly struck, without full detail, especially in 1971 and 1972, and most pieces acquired nicks, scratches or "bag marks" from contact with each other soon after striking. Although lower-grade silver coins can be melted, this is not practical for Eisenhower dollars due to the lack of precious metal content, and dealers often try to get any premium they can on face value. Completing a set of highest-grade specimens may be difficult and expensive, especially for the 1971 and 1972 from Philadelphia or Denver, which were not sold in mint sets, and thus only came to collectors through banks. A 1973-D piece, tied with ten other specimens for the finest known of that date and mint mark in near-pristine MS-67 condition sold in June 2013 for $12,925. According to numismatic writer Steve Reach, "as more people submit modern-era coins like Eisenhower dollars for third-party certification, the true rarity of many issues in top-grades is becoming clear."