It would be best to locate a realtor local to your house, so they can perform a "CMA" for you. A CMA is a comparative market analysis and will give you a relatively decent idea of what your house is worth.
it really depends on what the other houses that are similar to yours have sold for in the last six months or so. Things to compare them would be how many bedrooms, garage, corner lot, yeah it was built, etc. A CMA would give you a realistic selling price
If you are hoping to buy a house, you likely have a budget in mind. Hopefully, that budget includes fees that come with the process, not just the purchase price. The good news for buyers is that they aren't directly responsible for paying their agent. Agent fees usually fall on the seller.