Everyone is taking these coins for granted. It is widely believed that there are countless millions of coins and even if only 1% of them look nice there will be enough nice coins to last forever. So very few people collect them. This lack of demand then hides the fact that many of the dates are very elusive in nice attractive condition. It's not only the quarters but collectors have no idea how rare something like a well made and pristine '82-P is. The services grade poorly made coins at high grades hiding the fact that well made coins are virtually nonexistent. The reality is that most moderns were very lightly saved to virtually not saved at all. This means the majority of coins come from mint sets and these are virtually gone now lost to the ravages of time and a consumer mentality. Surviving mint sets are often tarnished now days. The long and short of it is that even coins in nice chBU like '76 type I Ikes can be difficult to find and if there were any demand they would be almost impossible. About clad coins John J Pittman is reputed to have said: "Nobody's paying attention to them," he told me in a conversation back in the early 1980s. "People don't bother saving them and dealers don't bother stocking them. Yet, these are U.S. coins as surely as silver dollars and double eagles. And, in years to come, hobbyists are bound to collect them." Another 40 years of neglect has failed to make these coins any more common.
Well, well....take a look at the latest price comps for Drummer Boy quarters. It shows that for those with D mint, one could make a pretty quarter in MS-68. Check it out: https://www.ngccoin.com/price-guide/united-states/quarters/38/ I just took out my box of Drummer Boy quarters and I think there may be one or two that could potentially be MS-68 level. One in particular has a rather high lustre appearance with Washington's hairlines in good detail, drumsticks and drum fairly detailed, and lettering, and rim, around the edge has not diminished over the years. https://www.pcgs.com/coinfacts/coin/1976-d-25c-clad/5897 In total, there's 53 mint-D quarters, and 48 quarters without mint mark from my box. There's probably one out of the 48 no mint mark quarters that may meet the MS-67 or MS-68 grade. Probably $75 bucks for this particular coin. For those of you who have S or D quarters in MS-69 or MS-68, there's some real cha-ching to be made now, if interested.