Topic: shoppingmall

hi,

Im currently using the gpl version of ashop, my only problem is that i dont have the ability for vendors to upload their files and sell it on my site so that i can take commision of sales.

my question is:
Can i just buy the shoppingmall and not the salesoffice as i wont be using the salesoffice.
If i can do this what would the price be?

all i want to do is setup a similar site like the downloadmarket.net