Hank, you're right. The price alltiresupply.com gave me was about the same, when including sales tax vs. the shipping I'd have to pay ultimategarage.com, give or take $5. But alltiresupply.com sent the jack over to my house in the back of a beat-up Toyota - can't beat the convenience! - and I've got the lower hassle factor of dealing w. a local reseller if I have any problems with it.
The thing I *haven't* seen anywhere else is Steve's modified A/C jackstands. The alternate center post w. the flat rubber top? I bought those from him (ultimategarage.com) and am at least as happy w. those as my A/C jack. The steel U-shaped tops of most jackstands just aren't a good fit with modern cars' jacking points. Most jackstands are designed like all cars still have solid rear *and* front axles! I've had my 911 shift a bit on sears jackstands, it wasn't something I want to risk again.