bitcoin open source ecommerce for multiusers selling of products?

[predic]

Hi, I am not newbie about bitcoins but I am newbie abour ecommerce platforms.
so, does anybody knows any open source ecommerce possibilities for me, when I would need next things:

1)if it is possible no javascript, just simple php and html and mysql. or minimum javascript.
2)users should be able to register at website and every user should get his bitcoin address, so, it is not website where only I sell something than users sell each to others. I think I should have some script for generating bitcoin addresses for every user or maybe for every purchase.
3)website should have escrow system for users
4)users should be able to send PM each to others
5)the only curency would be bitcoin.
6)if possible, users messages at purchase should be encrypted.

any help?

[QuantumKiwi]

Firstly i have to say this, your expecting a lot from an " opensource " package that doesn't exist yet.

No javascript? I suspect a high amount of the bitcoin API's use javascript.

Generating an assigned btc address to a user in a mysql database is technically fairly complicated, yet the model is simple. This will cost a decent amount of money and time for any developer to get running, multiple sites on the web already run this model and im sure you can find ( i have ) plenty of documentation - relating to the integration of bitcoin into php and assigning addresses to users in mysql tables.

Currently what your looking for does not exist in open source, you would need someone to code half of the payment API for a current online shop available as open source for any of this to happen.

I would be interested in this development as a business however the complexity turns me away, So a quote would be a fairly high figure and tbh, the ROI isn't high enough for bitcoin retail sales unless your talking about silk road which is a totally different subject.