buymac.com.au currently has two previous model (Late 2008) MacBook Air ultrathin notebooks on clearance, with free shipping included.
Edit (+3 hours): Updated the link. Looks like the $1,649 model has sold out — congrats whoever managed to buy one — but the $1,899 appears to still have stock.
$1,649 MB543X/A-CTO 1.6GHz Core 2 Duo, 2GB DDR3 SDRAM, GeForce 9400M, 128GB SSD (Solid State Drive)
$1,899 MB940X/A 1.86GHz Core 2 Duo, other specs same as above
They also have the MacBook Air SuperDrive on clearance for $99. The $1,649 unit appears to be "CTO", meaning that Apple upgraded the drive to a SSD (which was a very expensive option when these were released — I remember the upgrade costing $1,300 for my MacBook Pro last year!)
The internals of these two models are identical to the current generation (well, except that the 1.6GHz variant is no longer offered), and Apple even uses the same Model Identifier ("MacBookAir2,1") for the Late 2008 and Mid 2009 models. Since both of them include the 128GB SSD, I think they are a much better buy than the current $2,399 base model that comes with a SATA HD.
Mod - marked as expired.
OP - unmarked as expired and title edited (see comment) :P
very good price for air with ssd:)