... There are lots of Singer 522s going at reasonable prices on Ebay if you want to take a look.
There are lots of 507s, 522s, 513s, 533s, 514s, 518s, 538s and others in this range out there for £20-£40.
Be careful though, these machines have a number of common faults at this age.
- Plastic gears in bottom end broken from age or wrong lubrication
- Noise suppression capacitors burning out, either behind socket or in the foot controller
- Foot controller not working due to blown capacitor or worn contacts. Easy fix
- Arm thrust washer broken, throwing out the left-right needle timing. This is the worst, the entire top-end needs to be disassembled
All of the machines above I have owned, all of them were sold as working, all of them were faulty, all of them I fixed.
If you are tempted to buy one, check it's service history or be prepared to have it repaired. The parts are still available and cheap from the far-east.
I have a spare 514 in a table if anyone is interested. Have too many machines...