We just acquired a nice 1902 in PCGS PR-66 CAC that should be Cameo!  This page contains all quarters other than Bust and Seated quarters.  It includes several Washington quarter varieties for sale, as well as some decent non-variety Washington quarters, such as the wonderfully toned 1947-S, 1948, 1948-S, 1971-S and 1976 Bicentennial.
1902 Quarter PCGS PR66 CAC, s/b Cameo
Price: $2,500
1909-O VG-8, pinscratches
Price: $130
1917 Ty. 1 AU-58, nice toning
Price Reduced
Price: $395
1947-S PCGS MS-67 CAC
incredibly gorgeous deep toning! There are 197 MS-67's at PCGS with 3 higher MS-68's. I've seen pictures of each of the three MS-68's and none of them can compare with the overall appearance, including uniform color, of this coin! New TrueView photo from PCGS. Was $1,350.
Price Reduced
Price: $550
1948 PCGS MS-66 wonderfully toned
Nicer than a PCGS MS-67+ recently auctioned. Was $2,250.
Price Reduced
Price: $1,350
1948-S NGC MS-66 star toned
A fabulously gorgeous coin with blue and yellow on both sides. Looks more vibrant in hand than in the picture. Perfect for that Michigan Wolverines fan! Was $1,695.
Price Reduced
Price: $1,100
1951-D RPM FS-501 PCGS MS-65
A very easy RPM to see. And it is rare, there are only 10 certified by PCGS of which this is 3rd finest and the top two are in the top two registry sets. Reverse of coin is face up in the slab. Was $1,150.
Price Reduced
Price: $850
1952 Superbird PCGS PR-66 FS-901
Was $150.
Price Reduced
Price: $125
1956 PCGS PR67 CAM
A coin that in my opinion is close to DCAM. Was $140.
Price Reduced
Price: $125
1970-D DDR FS-802 PCGS MS-65
Was $165.
Price Reduced
Price: $90
1971-S PCGS PR65 QA - gorgeous toning
especially on the reverse. Reverse rims and lettering are light green, devices are orange and the center is red. The obverse is also toned green-gold with red around the edge. A wonderful coin if you like bright toners! New TrueView photo from PCGS. Was $700.
Price Reduced
Price: $550
1976 NGC MS-64, wonderfully toned
The orange and blue around the periphery of the reverse is more intense than the pic. Also the obverse peripheral toning is more colorful than the pic. A really rare coin with super toning like this!
Price: $1,150
1982-S DDO FS-101 PCGS PR-69 DCAM
1 of 8 in PCGS PR-69 DCAM, none higher, total of 23 in all grades. A completely black and white coin. Great Collections has one that starts at $450 + 10%. Was $400.
Price: $200
1995-S Clad DDO FS-101 PCGS PR-69DCAM
Tied for second-highest graded at PCGS with 8 other coins.
Price: $1,100