Has anyone used pic rel? How quickly do they respond to their emails/inquiries? sciencemadness seems to say they are reliable but the fact their only payment options are bank wire transfer, western union, and PayPal makes me feel a little distrusting however it seems to be the only website that would give me large amounts of certain chemicals for decent price that Sigma Aldrich, Thomas Scientific, Fisher Scientific etc. refuse to send me because I want it sent to a residential address