I bought one from Radum for about $250 and it's been good. They have a showroom where you can check them out and are not a dodgy eBay seller and you will get some backup on your purchase.
Radum Pty Ltd
I welded up a frame for the legs on mine to lift it up a bit. It's made for someone shorter than me. I also added some castors to make it easy to move around. Probably cost me another $100 in materials.
Cheers