Better Cell Phone Reception?

I use a cell phone as my main phone and I get horrible reception in my house..I know it's not just my phone either because this is my second phone, one that the dealer said is known for it's "awesome reception abilities" and my brother and mother's cell phones also get poor reception. I know you can buy those in home towers from the dealer, but ours will cost like $300 and it seems SO expensive..Any other ideas or places I can buy something like that, that will actually work? Also I know it's not the service because we live in a small town and I have been with a carrier that has the most service in our little town. Any help is appreciated! Thanks in advance =)