Foxconn has an x38a board that's on sale at newegg during a 72 hour email promotion for $99.99 after rebate. You'll have to register at newegg to receive emails. If interested, I would read some reviews and download the manual for bios info. I have the promo code if you would like to order, but it won't work unless you register first, which can take about 24 hours to add the info to the database.
No. It's just a suggestion. $100 will get you a decent board. The x38 is a little fancier than some, but any p45 or g43 board will work fine. I have an asrock g43 board collecting dust in my attic, but no one wants it as it has no warranty. It is a product sample.