This question could have been part of my "steep eBay discounts" thread just below yours.
The more I think about it, due to the heat and perfomance issues many people have had with it, the MBA 1.0 does not warrant a purchase at any price above 50% of it's retail price, as long as better perfomers are available, which they now are.
Let's say you're hungry. Your favorite restaurant is 1 mile away on foot. You start walking. At the half mile mark you are starving. At the 3/4 mile mark, you spot a new cafe that has gotten some bad reviews. Do you stop and eat there, having come this far, or continue on to the better restaurant?
If you're like me, you keep walking. If the cafe was at the half mile mark, I might have eaten there.