@Chris G That's my reasoning.
I am very new to this, but I have found several just in the last month or so. Some I found by driving my neighborhood. If a property appears neglected or vacant as @Ned Carey predicted, I check an online tax lien site, the auditors' site to estimate how much equity they may have, the scheduled sheriff sales site where the plaintiff is a clue to which are probably tax lien sales, and the Clerk of Courts which shows other foreclosure actions, judgments, etc.
There are a lot of tax lien properties...a whole lot! Some really are in horrible condition! That said, a few are in fairly nice condition and are also in decent neighborhoods. The 15 or so I've chosen to follow up on are in stable neighborhoods, appear to be in fairly good condition, and have tax appraisals between $70,000 and $145,000. (In Columbus, that will buy a respectable home.) Also, they have no mortgage recorded, and the back taxes/ recorded judgment liens are relatively low. Locating the owners is a challenge. Until I can do that I won't know if it is possible to purchase the house before the tax sale at a price that will pay all back taxes, any liens, etc. and allow for reasonable profit after making the repairs.
I was prompted to ask this question because a house near me which I know to have been a very nice house, sits abandoned, the owner apparently having just walked away. The house has no recorded mortgage and there are no other liens that I can find. The tax assessors' appraisal is over $100,000. Efforts to locate the owner are failing, and the Sheriff Sale is imminent. I have puzzled over why someone would not try to salvage some of their equity. I want to find him if for no other reason than to ask him that question.