I have been in the market for a mid range DIY air compressor for awhile. This one is marked as Save 300 from 699 RRP. It is about the normal 'good' price for a belt drive 2.5HP unit. However the stats suggest this one is slightly better - it looks like an IngersollRand copy as opposed to a copy of a cheaper compressor :)
The FAD, upper pressure and fittings and gauges are indicated as better quality in this forum discussion as well:
http://www.woodworkforums.com/f65/views-stanley-air-compress…
There are hundreds on no name brand compressors out there, and whilst this Stanley is no doubt just a rebadge, it appears to be a better quality rebadge than most. I suggest it is good value for money at $399, even if one of the cheaper belt drive units is discounted to 300 I'd still pick this one. Plus Stanley looks a bit nicer in the shed!
P.S first edit - check out this little PDF comparison with more stats.
http://media.supercheapauto.com.au/sca/files/fact-sheet/1aae…
I've got one. While I'm no expert on compressors it is a lot better quality than the cheapo one I had previously. A good buy at that price.