One thing I think folks need to know is that surveys are by no means perfect instruments. As a forester, I cannot tell you the number of times I have dealt with landowners with dueling surveys. Both landowners will have well-done proper surveys and neither survey comes to the same corner. They can very easily be a few feet off and both be legitimate. How is that possible? The entire land system in much of the country was measured using chains, especially so in old states like Georgia. Old chains were a bit stretched. New ones could be a bit short. None of that matters in short distances but over the course of miles, it made big differences. As a result, there were some sections that were a mile long, some were slightly long, some slightly short. This caused some 40 acres to be 41 or 42 acres and others to be 39 acres. In forestry we call them long or short 40's (or 80's, or quarter sections, or section, etc). The way this affects surveys is that a surveyor has to start at some benchmark or known point. Say one surveyor starts at the northeast corner of the northeast quarter of Section 5 and, with appropriate accuracy, shoots to your property and marks lines. Your neighbor hires another equally qualified surveyor who shoots from Section 4 coming in from the other direction. With equal precision and accuracy he comes up with corners that are a few feet away (or a boundary line). It happens all the time. Who's right? Neither and both at the same time. That is why typically land boundaries are settled on older use patterns rather than the survey. This remains true even with modern GPS. A brand new, hyper-accurate survey gets trumped by an old pine knot used as a corner the last 50 years. The old regular-use fence (if described as a boundary line in legal documents), beats any actual survey. Adverse possession (or general use), whether or not the intent was nefarious, generally beats the survey if the owner has in any way used the property for a specific amount of time. As a forester, one problem I have with surveyors is that their maps are not very useful on the ground and they rarely mark their work with any kind of permanence. Corners can often be notoriously hard to find and cut lines can disappear quickly. That is why once a survey is made, the lines need to be marked quickly or they revert back to nature. Often times, a surveyor will make a map, plot corners, etc but leave no trace of lines. As a result, you have corners (which you may or may not be able to find) but no property lines. Having typed all of that, I have great regard for surveyors and don't intend to trash them on a forum. And, boundary lines aren't so hard to find if you get used to doing it. I find them all the time when landowners can't seem to see them (having done a bunch of it) and a surveyor can find old survey lines that I can't see (and that is without his tools). $400 is a pain to pay, but it can be a cheap way to get the lines marked (but once that is done, you will need to mark it with paint, as usually surveyors only use flagging or other temporary markings).