I have $200 to spend...

Up until now I've been using a Fiskars reel mower to cut my grass. It works ok, but I've decided it's time I got a gas powered push mower to use when the grass gets too long. I only have about $200 to spend, and I don't need anything fancy. Lowes has a Troy-Bilt for $200 (link), which seems to be one of the best bets if I want something new and don't want to order online. My other local option is to buy a used Honda Harmony 215 that is being sold on craigslist for $200. Assuming it was well taken care of, would this be a better option? Finally, I could order something from Amazon. The Husqvarna 6021P (link) seems to be well received. Which of these three would you recommend?

If you're on that tight a budget I'd buy new because you get a warranty. Starting this weekend at the store Sears is having a 30% off sale and check out floor models at sears, lowes and HD.

If you get an MTD, parts will always be easy to find, you will have a briggs engine and you operating costs will be low.
These mowers last a long time if maitained properly.