Fairfax Specials?

My doctor requires her patients to have two vials on hand for all IUI's just in case there is a problem with one. I need to purchase one more vial but I keep watching to see if Fairfax is going to offer any end of the month specials. I am really getting down to the wire and need to order soon but I will really frustrated if I purchase the vial and then it goes on sale shortly after. Does Fairfax have a policy on honoring their specials within a certain time period? Does anyone have any experience with this? Thanks!