So, before I started working with nylon and such, I was making leather holsters and belts. If you are interested in that sort of thing, leatherworker.net has a good forum to check out.
They also have a "for sale" section on there specifically for sewing machines. Some of the machines are specifically for leather, but there is a pretty good assortment of machines.
For some reason, there seem to be a lot in the Detroit and Washington State area. Like this forum, there are people from all over the world.
If you are in the market for a machine, it's worth taking a look.
Chuck