What is 1935 US one dollar bill worth?

1935 Silver Certificates in well-worn condition are worth about $2.00 -- lightly-worn about $3.00 -- crisp uncirculated about $6.00

If it's a Series 1935 A, with a brown Hawaii seal or a yellow North Africa seal, its value will be much higher.

If it's a Series 1935 G and has the motto In God We Trust on the back, it's worth about $5 circulated, $18 uncirculated. Note that most 1935 bills do NOT carry the motto, and that's not an error. It wasn't added until partway through the G series.