It is known that a dedicated server is an expensive hosting solution. Prices can vary greatly. You can find prices as low as 30-50 USD per month and as high as 1,500 USD per month. The price is determined by the resources you want the server to have and its reliability. On average, you can expect to pay 150-200 USD monthly.
Hence, to estimate the monthly amount you will spend on a dedicated server, you need to define your technical requirements. First, decide what kind of CPU you need. Do you want the fastest and the most efficient? Or you can compromise? Do the same about RAM and disk space. Consider that SSD technology is much faster for storage but significantly more expensive.
Another important technical requirement that impacts the cost of the server is the available bandwidth. Unlimited bandwidth is the best solution in this department, but at the same time, it is the most expensive one. You should opt to buy slightly more bandwidth than you need. Now, once you have a list of technical requirements, you can start to compare the prices of different hosting plans.
Next, consider the reliability you need. You may find cheap solutions that meet your technical requirements. However, is the server and service reliable? Check that the network infrastructure is good enough to guarantee the continuous functionality of the server. You do not want your dedicated server to go down often, do you?
Hence, while you are comparing different hosting plans, do not look at the price only. Check the uptime guarantee and redundancy of each option. Finally, check their customer support. Remember, if your server is down, the provider must be able to provide support and fix it any time, any day.