I bought a used Precor about 7 years ago that goes to 12 mph. Its real basic. There are no set programs, just speed and incline. Getting in shape I usually stay between 9 and 10 mph, but once I start my marathon training I do 10 mile progression runs where I increase the pace every half mile until I'm running at 11.3 mph by the end.
Like I said I bought my used. I found a place on-line. I can't remember the name of the place, but it was back in California. They pack it up and shipped it out. You might want to check to see how much power the treadmill you choose uses. Mine required a 220 line that I had to install in my house.