To find the land, you can try this, together with your GPS:
You'll need to check things like if there ability to have access or if you have to get permission from neighbors, if it's owned solely by the person selling their share or if it is under joint ownership, etc. Something can look great until you find out the details, when you understand why it hasn't been sold yet. Some of that you can find out here:http://www.judicial.gov.tw/db/alx.asp
You need to search in the area the land is, put in the details you know, then check the record. It shows the date it will come up for auction. You need to place your written bid on that day, at the local court the land is listed under. After three bids, there is a month where people can bid and if the amount is over the minimum, it is sold. After that, there is a fourth time when there is no or a much lower minimum price.