What is the best place (online) to buy A1C test kits ?

For those that self-monitor their own A1C at home, where do you buy your test kits ? How much (on average) do you pay ?

I've purchased test kits from Walgreens and CVS before, but the over-the-counter price at the store seems a little pricey. Recently, I purchased a box of four A1C test kits for $53 on Amazon - under the brand name "A1C Now," but my doctor told me to avoid using the test kits from this company, because his office used to use the same test kits, but no longer uses them, because they (allegedly) give false readings - inaccurate results.