Can you give me any idea of the value of a Singer Manufacturing Company sewing machine, G2775438, with cabinet? Also, any idea of the year it was made?

The G2775438 was built in 1913, according to the Singer database: http://www.singerco.com/admin-support/machine-serial-numbers/single-letter . This serial number is for a Model 66 (built after March 19, 1913). The value depends on the condition and the specific cabinet and accessories that are with the machine. A worn model 66-1 with a basic cabinet is ~$50. The higher end cabinets can raise the price to $125. (Those were the prices ~10 years ago.) Someone wanted $175 for an advertised good condition model 66-1 with a really good cabinet on Etsy a few years ago.

I hope this helps.

Cindy Wells