Currently, there are few examples in the clad series that are valued as highly as the silver series but there are certain extraordinary dates or variations. The deep cameo versions of proofs from 1965 to 1971 and 1981 Type 2 are highly valued because of their scarcity, high grade examples of quarters from certain years of the 1980s (such as 1981–1987) because of scarcity in high grades due to high circulation and in 1982 and 1983 no mint sets were produced making it harder to find mint state examples, and any coin from 1981–1994 graded in MS67 is worth upwards of $1000.