I have and like my HF 7-ton hydraulic crimper.
OK not exactly easy to use to make a beautiful crimp. The dies seem too small as marked. With a single crimp you will end up with dog ears. For a pro looking crimp you will need to less than fully crimp and rotate and re-crimp a bit more each of maybe three times to make a nice hexagon crimp. Have some extra lugs to practice.
Not perfect but does very well with some practice. A real hexagon crimper set that goes #10 to 4/0 in one shot is going to be way more money.
I always recommend crimp over solder for this application. Once you have a good crimp... solder is just a waste of time and probably make a mess of the insulation.
Used tools I would offer 1/3 retail although 1/2 would not be too bad if barely used.
http://www.genuinedealz.com/heavy-duty-crimping-tool-for-battery-lugs-terminals-6-awg-250-mcm
