The new SRF-3 Sturmey Archer 3 speed can be had for around $65. It's a great hub, but I live in the hills and 3 speeds aren't enough for my 64 year old legs. My Sturmey Archer five speed works much better for me. It's a NOS 1982 hub and was rather expensive. It's an easy conversion. The hardest part is building the wheel.
1959 Carlton
1973 Raleigh Competition