A logistic system ,include sales,purchase,stock,invoice,pay management,how much?

we hava A logistic system ,include sales,purchase,stock,invoice,pay management
but it's Chinese version
some one want to buy it and ask us translate into English version
but we don't know the value.
can u give us some suggestions ? thanks very much.

some feathure:
asp +access ,open source
More Than:
100 models
600 code pages
100 database tables