If you have a small bathroom, then installing a wall mounted toilet and sink can help to give you more room to work with. Wall mount toilets are not hard to purchase; you can find them quite easily online. Prices vary depending on which particular model you purchase and where you purchase it from. Some models sold online do not come with a flush tank, while others do. This is particularly important to take note of, as you would most likely want to purchase a wall mount toilet model that comes with a flush, as this is not only simpler but also cheaper in most instances.
Be sure to consider your bathroom plumbing before selecting a toilet. If the bathroom in question has always had a floor mount toilet, you may want to consult a plumber regarding whether or not it would be expensive to install the plumbing for the wall mount toilet. A plumber should be able to give you a cost estimate regarding how much it would cost to install such a toilet, as well as valuable advice regarding which type of wall toilet to purchase.
If you shop online, take the time to read the description carefully. Note the size of the toilet and make sure it would fit well in your bathroom. Note also what comes with the toilet and what does not. In some cases, the toilet seat and/or lid are sold separately.
Be sure to take all the above mentioned factors into consideration when purchasing a new toilet for your bathroom. While it may take time to consult an experienced and competent plumber, look up a number of wall mounted toilet models and even measure the bathroom to ensure the wall mounted toilet you purchase is the right size, it is worth the time and effort in the long run.