I picked up a Metcal MX500 on ebay for $250. Excellent machine.
Before I got the Metcal, I was using two of the CSI stations mentioned above. If they are sold out of the $35 model, you could spend a few more $ and get the digital model. I believe you also get a free DMM with orders over $50. Make sure to get your extra tips, shipping is on the high side.
If you can spend in the $100 range, plus tips, get a Hakko (936, I think). You can't go wrong with a Hakko.