I was seriously considering a brand new one at a pretty stunning cost (~ $3000), because I figured since most are well over $1000, I might as well bite the bullet and buy the dream! Well, as fate had it, the very next day one appeared on craigslist. (I've been watching craigslist for almost 2 years) Its not the "dream", but everything I need and perfect for my space. It is not in perfect condition, but has a couple cosmetic dings. But I got it for under $300!!! Now I can also get a new chair, some lighting, the acrylic insert that fits, and possibly a new small TV to keep me company! I'm picking it up today - I am so excited.
Be patient, you will find just what you need. Look for something sturdy, and stick to your guns so you'll be happy with whatever you decide on in the end.