Do check shipping costs when buying online - some stores () will even ship for free for a first order! Do also consider the alternatives to Littmann - Trimline's (DRG) PureTone, Riester's cardiophon and the MDF range are among the best. Look also for...
I would suggest online - make sure it's from a company you can trust, searchy thoroughly for the best price for the item you want and be sure to check the shipping cost