Online places to buy vitamins

Now, I know of Vitalady's system, but was told that they are cheaper when bought separately. I'm an amazon prime member, so before I buy them all on there, any other options? Any specific brands? I have three weeks before my surgery so I want to get them as soon as I can. I can wait for the traditional week from some place else as opposed to prime, which sometimes is a bit more expensive, and I think shipping is put in the total cost of the item. Thanks. 

I buy most of mine from Puritan.com when they have buy 2 get 3 free sales with free shipping.  Also there is almost always a promo code out there if you search the web.

I buy some from vitalady and some on amazon. I get my Calcium from Meijer, A&D from Amazon (Biotech), and my Iron from vitalady, I use a celebrate multi ADEK as well.

For future reference... Biotech Vitamin-A is cheaper through Vitalady. She charges $6.99 and Amazon charges $11.09!

I buy Vitalady's zinc, copper, vitamin-A, vita-min, & "calcium citrate only". On Amazon (because they're cheaper) I buy Biotech Vitamin-D, Vitamin K-2, & KAL Magnesium Glycinate 400. At Walmart I buy folic acid, B-12 lozenges, B-6, & vitamin-C. I buy my really good probiotics at Sprouts health food store. My Mom (she just had VSG) buys her vites from Bariatric Advantge online and they have a free shipping promo code.
I went to my pcp about proferrin iron and he wrote me a Rx for it. My insurance needs a prior auth so thats what's happening right now.

You definitely want to buy Biotech D3-50 from Amazon.
Amazon: $19.27 Vitalady: $25.99.
I also buy my KAL magnesium Glycinate on Amazon.
Oh, and MK-7 (Vitamin K2) I buy on Amazon to save a couple bucks. Anywhere I can save, I'm all for it!
Amazon $40.50 Vitalady $42.99.
Biotech Vitamin-A... Amazon $11.09 Vitalady $6.99
(So obviously get vitamin-A through vitalady)
I get her Zinc and Copper because I never took my vitamins in the beginning years and now here I am almost 10 years later and I'm a little low in zinc and copper so I have to take a little more than what's in my Multi. I figure hers are the best quality.

Thanks everyone! :)

amazon is the best

I buy a mix mostly from amazon and vitalady.

I'm a prime member but I don't usually see the cost built into the price. There are always some
options that are not Prime eligible and the prices are usually comparable. Not
always but for sure on the D3.

I do regularly check Swansons, Puritan's Pride, and Vitamin Shoppe  when it is time
to restock or they seem to having a great deal.  I've been doing Sundowner(sundown?) carbonyl iron tablets
lately instead of the vitalady tender iron capsules as an experiment. A couple of people mentioned 
that they seemed to do better on the tablets (YMMV). A and D I always get Biotech from wherever.

Although I will keep in mind to doublecheck the vitalady cost before buying next time - it depends on if I 
am buying other things from her and can absorb the sipping across multiple purchases.

My main sources are Amazon, eBay and Lucky Vitamin. 

I will go hunting elsewhere if there is something I need that I can't get from those three.