What is the value of a 1943 singer sewing machine with cabinet?

It really depends on where you are and how easily they are to get in the area you live. If you buy at auction you can still get them for between $25.00 and $100.00 where I live in Pennsylvania, USA. In an antique shop you'll pay between $150.00 and about $250.00 depending on the cabinet wood condition and how elaborate the woodwork is and if the machine condition still retaines the original decals and emblems. The closer to the machine and cabinet is to original condition (not striped and repainted) will add to the value.