One way it’s like looking for a spouse: all the good ones are already taken. You have to wait for the moment when the right one appears on the market.
The riding around technique rather than relying upon realtor MLS listings works in very popular neighborhoods where FSBO actually works pretty well due to demand. To land a house in such an area that you really like, patience is in order and also “flag” the ones you like the looks and location of. Eventually one on your list will pop up for sale, and you pay what they’re asking for it so long as it’s not totally out of line with recent comparable sales. Haggling too hard won’t work for a very desirable house, somebody will come along soon enough and offer list, sometimes better for it.