It depends on what is offered in your area, and what you consider a reasonable price. The primary broadband options generally available include:
DSL. You need to get the line from the phone company, but they may offer it without voice service. You will probably have the greatest variety of offerings for different speeds and ISPs with this option.
Cable. Does not require TV service, at least not where I am. Likely to only have one or two service tiers (speed/price packages).
Cell service. If you have a cell phone (I assume you do) check with your carrier for their data services. You will probably have to buy a modem (usually USB). You will be able to use this service about anywhere that you can get cell phone service.
Satellite. You need to install a small dish with a clear view of the southern horizon (well, a little above the horizon actually). Probably the highest initial cost.
In all cases, you will have to contact the carriers in your area to find out what is offered. Services and prices vary by location, and they are the only ones with definitive answers.