How much are 4 uncirculated 1935 1 bills worth?

It depends on the series letter, if any, next to the date.

As of 08/2010, auction prices for uncirculated 1935 $1 silver certificates are roughly:

No letter or A - $18

B, C, D - $13

E, F, H - $7

G without "In God We Trust" on the back - $10

G with "In God We Trust" on the back - $18

Note that these are estimated prices and can vary over time.