When I bought my first machine, I was thinking about the boss but wondered why anyone would want to pay $1500 for a hand powered machine when they could get a good enough powered machine for $900 that can do pretty much the same.
I did buy a Taiwanese machine, called in various parts a Ferdco Baby Bull, Neel's Model 5, Mach 1, etc., but it's a damn fine machine. I'm sure the Boss, stitch per stitch puts down a nicer stitch, soething coparable with the most expensive machines, but my Tai machine is nothing to sneeze at. It, like the Boss , feeds the leather only with the feed dog and does not have a reverse.
Recently, because i saw the real need for a compound feed machine, I bought a machine very similar to the Artisan Pro 4000 and the Ferdco Superbull, but i still prefer working with my Baby Bull, which taught me a lot about reading stitches and tension. it's a machine a feel comfortable experimenting with.
I bet you can get one of these machine's raw for about $600, polished up and modified a bit for $800.
Ed