Have you ever looked at Hyatt's, there is one on Jefferson Rd. near the 390. In Buffalo they are cheaper than Michael's. I have also bought quantities from several online sellers; Cheap Joe's, Dick Blick, etc., cheaper yet. You will pay tax at Blick.
I found your comment about cold press paper intriguing, have you ever tried rough? I have some of both, will have to give it a go some day.