Get a professional opinion from a local agent that knows your market. You can also have your home inspected so that you can fix anything that is a problem BEFORE you list it and then it will be easier to close once you get a contract. And of course, hiring a home stager is also something to consider if your agent does not give you enough information on preparing to sell. I am a home stager as well as a broker and I tell people that first and foremost your house must be clean. And when I say clean, I mean really clean. No dirty carpets, clutter or too many personal items in the home. Also, too many bold colors can disrupt a buyer's attention...so some homes do need "neutralizing". If you follow my advice and hire professionals...you should go just fine.
(1) Hire a home stager to give you an evaluation. That may cost several hundred dollars. But it'll be worth it. You'll get tips, suggestions, and guidance on how to make your home look the best it can with whatever investment (small or large) you want to make.
(2) Have a Realtor make some suggestions on quick, economical improvements. And then have the Realtor look at the comps to determine where you should price your home to sell quickly. Example: Your home, nicely fixed up, might sell for $200,000 if you're willing to wait 60-90 days for an offer. It might sell for $180,000 nicely fixed up, if you want an offer in 30 days. It might sell for $170,000 in as-is condition in 60-90 days. It might sell for $150,000 in as-is condition with an offer in 30 days. Note: Of course those are just made-up numbers. But the point is that a Realtor should be able to give you different options, depending on your desired speed of sale and depending on what fix-ups you do or don't do.
(3) Sell to an investor. The investor will buy in as-is condition, often within 14 days (sometimes less). The drawback is that this will result in the lowest sales price. Using the scenario above, an investor might offer you $90,000-$110,000 or so, depending on the repairs that are needed.
Also: Painting, cleaning, and decluttering are the cheapest things you can do that'll produce the most "bang for the buck."
A final note: The county valuation is worthless. Don't pay any attention to it. It's developed for tax purposes; that's it. You need a Realtor to determine what it's really worth in today's market, adjusted for condition and needed repairs.
Hope that helps.