The 1892-S is the nicest in the bunch, with apparently original color and no visible wear. It is also a slightly better date. The field hairlines should limit it to MS-60 or MS-61. The 1880 and 1881 look BU but they appear to have been shined up a bit, possibly for jewelry use. The 1883 is a heavily marked AU with rim damage. The 1881-S looks like a solid AU-58 coin but the many hairlines and marks hurt the eye appeal.
Overall it's an excellent bullion lot. With the possible exception of the 1892-S, I would not pay to have them graded since their value is based on gold content rather than condition.