price will be a little higher than the price paid by 100%T/T in advance

Firstly, you should send your annual financial report and reputation for us checking. We will decide whether we accept this Payment terms within 15days. Our usual O/A payment terms is as follows:
O/A 30 days
O/A 60 days
O/A 90 days
O/A 120 days
Of course, price will be different according to different payment terms.