As a foreigner, I prefer newer ones. The windowpanes are newer and better sealed preventing leaks. Plugs are grounded and the same three pronged ones we have in Canada/USA which means its safer. Newer buildings come with newer building codes. They often have heat pump AC units instead of those window AC units which are often cheaply installed and leak heat(and thus hydro) out the window, wasting money. I went from an old building to a new building and my hydro bill dropped from $4000-7000 to $1000 bimonthly and I USE my AC units…a lot to keep things dry and cool.
I prefer buildings with a dedicated natural gas line because it’s cheaper and easier to cook with. Hot water is cold until needed and never wasting hydro stuck in a water tank leaking heat.
Internet, most companies want a two year contract. Water is cheap.
591 is easy cause it is a bunch of people and real estate offices all putting houses on one classifieds site. You can also check www.housefun.com.tw. If your Chinese is good, you can call the number listed in the ad or see if their number adds their LINE, of which most agents tie their number to and message them that way.