As the proud owner of my second 246T, I'd tend to agree with what was just said. Uniden throws everything you need into the box: AC adapter, rechargeable batteries, antenna (duh), manual, etc etc.
The dynamic memory takes some getting used to if you're coming from a background of only having used "bank"-type memory structures, and if you can just be patient until you "get it," you'll come to realize there's nothing else like it in our hobby, and it's a welcome addition.
The 246T is missing the Pro-164's MilAir band (roughly 225-406 MHz, with 380 to 406 being using for some low-end UHF trunking systems nowadays, primarily military operations related). For the money, I'd buy a 246T over a Pro-97/Pro-164/PSR-300 every time, but that's just me.
Size was mentioned: the 246T is rather diminutive compared to the Pro-164/etc; uses less batteries as mentioned also. I prefer the size to most other scanners, even the 330/396 which share the same form-factor. Wouldn't mind getting another 330 at some time to get that MilAir coverage back - I live in Vegas and Nellis AFB is like 5 miles from me on the north side, McCarran (commercial airport) is 5 miles due south, so I'd be able to listen in on both (the 246T does commercial air, of course, already). I wish sometimes they'd thrown MilAir into the 246T and really, I have never been able to understand why it was left out (the 330 covers it, and a lot more, and is basically the same cost so I can't believe it was a price issue).
It all comes down to personal preference I believe. I think the features the 246T offer are worth the cost even for the slightly reduced coverage - no MilAir - and the dynamic memory more than makes up for it with ease of use and no wasted memories as is so common when trying to program systems into "bank"-type scanners of old.
But at this point, I'd say skip the 246T and do your best to locate a 330 if you can find one for roughly the same cost. They're disappearing from the market relatively fast now that they've been discontinued. Uniden had some refurb stock for a while but it's depleted now; a lot of RR members grabbed 'em for the ridiculously low price of $175 + shipping direct from Uniden, and I wish I could have grabbed one myself.
Good luck...