I have owned two juicers, both of them around $300.
The Champion - which seems to be an older style juicer, it works very well but doesn't do green leafy very well or wheat grass.
Omega - Everyone I know now has this juicer. It has the same quality as the champion but can do the green leafy stuff and wheat grass. It also comes with some helpful tools (pulp catcher, juice catcher, cleaning brush). Here's the one I have. Been over a year so far and zero issues. It gets used pretty much daily and my wife and I have both done several juice fasts where it got used multiple times every day for 30 days straight.
I've never used a super expensive juicer like $900 but I've seen people complaining here about foam on some of the more expensive juicers.