I am in the Washington DC area

8x10
Fujiflex SG Super FA3 100 sheets $30
Kodak Radience 100 sheets $20
Fujichrome SG 34 100 sheets $20
Fujichrome SG Super Fa3 100 sheets $30
Ectacolor Supra 200 sheets $35

11x14
Kodak Ectachrome Radience 50 sheets $15
Ectacolor Supra 200 sheets $45

16x20
Fujiflex SG FA3 50 sheets $30
Fujicolor G type C Super Fa 150 sheets $50
Fujichrome G type 35 200 sheets 75

20x30
Ectachrome Radience 50 sheets $50
Fujichrome Supergloss Type 35 140 sheets $ 160