The only problem I could see is different people wanting same size pot, wanting certain complimentary tea sample, etc. Of course it might end up being slightly more we all have to pitch in to cover shipping after we get the pots to a central location.
Personally I call dibs on any of them around 100ml

As an extra question though, are these pots really worth 75~80 including shipping? They seem to be "dipped" pots being made of at least three different types of clay. Pin Zini is a mixture of two or more clay types I think, and Hong Ni outside.
EDIT:
Thanks to pb2q's detective work, here's the official sizes of the teapots;
#1 - 30ml, #2 - 40ml, #3 - 50ml, #4 - 60ml, #5 - 70ml, #6 - 80ml
#7 - 100ml, #8 - 110ml, #9 - 130ml, #10 - 140ml, #11 - 160ml, #12 - 180ml.
I'm going to try and list what everyone is ordering, and who called it first on a time-basis after pb2q's post on the official sizes on the second page. The asterisk and the name next to the # of pot is who has dibs on it, and same goes for the samples. NOTE: This isn't final- you can negotiate amongst yourselves after a pot has already been called to work out who wants what pot more.
#1
#2 *odarwin*
#3
#4
#5 *pb2q*
#6 *Olivierco*
#7 *cupioneer*
#8 *thejamus*
#9 *wyardley*
#10 *pb2q*
#11 *Goose/Jim*
#12 *Drax*
"He also said that they would be willing to ship them separately in case of a group buy of the complete set, but a tea sample set is included (mentioned on the page), and they'd need to know who gets that.
The sample set of teas consists of:
- 25gr of 1998 cooked Meng Hai Tea Factory brick
- 25gr of Single Bush Dancong
- 25gr of Ying De Gold Red Tea
- 25gr of Traditional Shui Xian" *wyardley*
EDIT:
Sorry guys, but due to the economy's downturn, I'm unable to afford spending money on tea, let alone teaware. I unfortunately have to back out of the group buy. Anyone else still wishing to continue this can do so, but be warned, it's a large pain in the neck!
Sorry again guys.