A great place to buy plantation shutters is online. While some of the stores that used to stock them no longer appear to be, there are many newer online stores that deal specifically with window treatments, and even some only deal with blinds.
The most expensive shutters are those that are made of premium hardwood. Quite often these shutters are completely custom designed which means you can order specific size shutters and choose the size of the slats you want and what the finish should look like. On the other end of the spectrum, you'll find vinyl or synthetic wood shutters which are most often found in standard sizes and are not as customisation as other types.
Another point to keep in mind when ordering cheaper blinds online is that they are generally designed to be self-installing. Fortunately, they're usually pretty easy to install, and you don't have to be a carpenter to put them together. If you or a family member can drill a hole and use a screwdriver, you should be able to install your own standard planting shutters. Most stores that sell blinds online also offer free shipping, which helps keep costs down.
If you decide to order custom plantation shutters online, you will need to be very specific with your order, both in terms of the actual size and shape of your window and the type of wood you want to make the blind from. It may be better, if you have an unusually shaped window, such as a window with an arch, for someone to come and measure the window rather than trying to submit the specifications over the Internet. If your window is at least an easily measurable standard design, it should be fairly straightforward to measure and order online. Many times, if you buy more expensive designer blinds online, you can request a sample of the woods and stains they use so you can more specifically decide which shade will best suit your current decor and furniture. Also, if you go to the trouble of ordering designer shutters, it might be worth paying a little extra and having a craftsman install them for you.
With so many stores offering plantation shutters and window treatments for sale, you'll find that prices vary widely from store to store, and depending on the options you choose and the material you order your shutters from. However, it's pretty easy to make comparisons based on the prices and quotes you receive, and you should be able to find something to suit your budget and taste quite easily.