The refurb ones should be ok.
You cant beat the $45 prices.
There's a new open box one on eBay for $55
I would definitely get the eBay one while you can.
Can someone post the mainboard from a black arrow hobbit?
They are compatible.
Meanwhile there are plenty used mainboards out there or new for a high price:
JJP lists the populated IT Hardware mainboards for $199 but claim to be out of stock.
I would call and verify this, its also a good price