What harmonica should I buy, and where? You wouldn't believe how many people ask me this question.
If you're in the market for a harmonica or two and don't have a good local music store nearby, I'd encourage you to order from one of the following suppliers. As I note on the FAQs page, I've been using the plain old Hohner 1896/20 Marine Band harmonica for more than 30 years and still think it's the best sounding and most reasonably priced stock instrument on the market. You do NOT need to spend $100-200 on a customized harp in order to get a terrific sound.
Here's a quick link (USA and Canada) if you'd like to start with the exact same harp that I started with, and still use today:



Much as I like Marine Bands, I would encourage you to try several different makes and models and see which feels and sounds best to you. Below are links to three reputable suppliers--one in the US, two overseas:
In the USA and CANADA:

In the UK and EUROPE:

and..............
Hohner Case of Marine Bands Harmonica 5-Pack
CUSTOM HARPS:
If you're in the market for a custom harp, there are many fine models to choose from. When I finally broke down and decided to spend some bucks for my first custom harp after 34 years of out-of-the-box harps, what did I go for? A Joe Spiers model customized (State II) Hohner Marine Band. I spent my own money on it. I love it. (And no: I don't make a cent for offering this testimonial.) That should tell you all you need to know:
http://www.spiersharmonicas.com/index.html
If you're in the market for a slightly cheaper custom harp, then I'd urge you to check out Knucklehead Harps. I haven't actually played one of Mark Munoz's cleaned-up and tweaked pre-owned Marine Bands, but I like his approach so much that I'm putting his link here. Take a look at his website. He gives you a very informative sketch of the steps that he takes to bring a harmonica back from the dead. I love his approach:
http://knucklehead-harps.yolasite.com/