Insulators as follows -- actual postage additional:

U-459 awesome speckled blue glaze (Lapp product) -- no issues -- $12 (SOLD)

U-269 (sim) mottled grey -- factory base flaw (Pittsburg product) -- $10

U-281 (sim) -- super squatty style - no markings -- two tiny skirt flakes -- $8

U-269 (sim) great drippy blue -- tiny bruise and small open base bubble (Pittsburg product) -- $12