Hello

I am Planning my next web site and I really need some help on this one.
I would like to have a website where people can list items for sale in specific categories with image upload after registering a sellers account, but also have a registration process for buyers. Something on the lines of that megalith company beginning with 'e' but not like them if you know what I mean. I would like to be able to charge a small insertion fee for sellers unlike Big-'e' through paypal which I know is owned by Big-'e' or perhaps use some other payment system so as keep big-'e' from getting any bigger.
I was wondering if bluevoda, Soholaunch or or zen cart or other could be utilized for this or should I do I have to buy a ready made program script to achieve this.

Any advice would be greatly appreciated and most welcome.
Thanks in advance
I will be away tomorrow but will check as soon as I get back.

Max