@speakeasy

Stationary is a price war game.
I strongly recommend you to take alwjmonster advice & setup a retail outlet as how he described because if you were to based at home, then you can only target offices in which they will make price comparison (that's where the problem come in).

Secondly, if you're stepping into the price war game, in order to win, your cost must be cheaper than your competitor. Unless you got close relationship with your supplier or you know where to source (obviously you don't since you just asked for those info) then you would have lose out in the first stage. Your competitor most likely exist in the market for sometime & the price that they are getting usually cheaper & most of them was offered longer payment term which help in your cash rolling & stock planning.

Mind to share with us your skill & expertise? If you can't beat your competitor in price, then you will have to find something else as your selling point.

Last but not least, to get those pricing info, just Google for the branch name, call the number & introduce yourself, you will be guided to the right person & from there you can get your prices.