I have a 32GB iPhone 3GS, the old bootrom version before apple locked it down.
It's unlocked for use with any carrier, it's jailbroken with tons of great apps and utilities, and it has a modified comm. center provision for tethering.
That's right...I tether this phone on ATT all the time to my notebook, works awesome.
It's running OS 3.1.2 with the hash files backed up...meaning no matter what apple does, you can always restore to 3.1.2 and keep your unlock and jailbreak. Which is a big deal.
The jailbreak also gets you tons of features that you won't get out-of-the-box. Multi-tasking, extended clipboards for copy/paste...you name it.
I have the original box and accessories for it (minus the headphones, as they're cheap and broke right after I got it), and I'll include a case also, since I keep it in one.
I love this phone and use it everyday.
Just thinking of moving to a different platform for now.
I can take pics later, but here are a couple screen shots:
