Why not a "group purchasing" addon (to auction) ?

Hello Drupals,

a quick idea/suggestion from a newbie...

I was wondering about adding a "group purchasing" option to auction.module (not only, but let's start easy).

Writing "group purchasing" i mean :
a. the possibility of buy a pdt/service together with a group of person that share the same commercial interest in it
b. the possibility to offer pdt/servicex to gruops, indicating the min/max number of orders wanted and other functions.

I actually did something like this in the .asp portal i manage (wich will be soon -entirely- migrated on Drupal), and i think it has a great "viral power" for web communities; on the same time it colud be a great tool to help people (expecially who really need it) getting a good or service at reduced price (as scale economy suggest).

It would be great for me to contribute to Drupal starting on this subject (in Italy we use to say: "late is better then never").

Unfortunately, as a dummy user, i cannot be very usefull alone with my "machine", nevertheless i'm sure some of my skills could be useful to contribute to the goal.
I'm discovering Drupal since a half-week, so please be patient if this feature already exist or if my suggestion could sound "not clear"; in the next (hoping) few weeks i'll be a bit more skilled about Drupal and probably i could do more to support the idea.

If anyone is interested, please give advice!

Regards,
Tommaso.