Unforunately, great refurbs constantly pop-up on the refurb site...but there are a few users (I am assuming they are resellers), who quickly buy them!!
For example, one time, I had a real nice I8600 spec'ed with 1.7 PM, 512 1 Dimm, 128 MB ATI, Secondary Battery, APR, DVD+RW, and WUXGA for 1900 and after the coupons it came to like 1550 with free shipping, but before I could check out (which took long since I don't live in the US and had to find the address of a relative to whom I could ship it to, etc.), someone had already taken it. Most of the times, refurbs are really nice. For example, I once bought a Latitude X300 (refurb), and then had seen the smiley face on the screen, and immediately called Dell. CS offered a system exchange for a better spec'ed new X300 and like 300 USD credit!