Insulators as follows -- actual postage additional:

U-57 (embossed) MACOMB - just some minor pings -- $8

U-48 no markings (LIMA?), small base flake -- $5

U-64 (crown embossed) OB logo, filed base, nice color!, no issues -- $8

U-32 (dome embossed) D in a square, base flake and small bruise -- $8 (SOLD)

U-42 unmarked, no issues, MLOD - $8

Take the remaining four for $22