No germs are going to be able to live liong enough for you to get an "infected" game, and if there was actually visible shit, I'd say that's a return they have to take. If you're seriously worried about that, then you should never buy anything used, ever. Or leave your house for that matter.
Yes, when you set up the calculator, you tell it 4 things:
1) How much it weighs
2) Where you are shipping from
3) What method(s) to use
4) How much you want to tack on in addition to the real cost
Anyone that is unsure of how many points they have can check their balance at www.myrewardzone.com - I bought my PSP there and that alone was enough to come out ahead from signing up.
Or you could by the new Advance guide which has all of thse systems, which is why they removed the free lists. If you don't want the prices, eveything else is in the database and it's easy to generate lists by system.
Rumble is an annoying, worthless feature. The only time it ever added to a game at all it was a forced gimmick. Losing rumble isn't an issue at all, it's a plus!
The only reason 1 DIMM would be better than 2 is that it makes easier to upgrade later, as the laptops can only use 2 DIMMS. It's easier to add than replace.