I don't think you're going to get one for less than $200, especially with GT5 right around the corner, they're in high demand.
Your best bet is going to be to pick up a refurb though, I got mine for 249 CAD at canadacomputers. They're priced at $229 right now, however are out of stock.
If you can wait, there is occasionally a really good deal on the G27, watch sites like redflagdeals.com, they're usually put up on there.