There are a lot of varaibles associated with that, especially location. You can try getting an estimate on your own, using eppraisals.com or the other sights, or get a realtor to pull comps from mls; if in Greenville county, the county website will provide the comps, and will include FSBO not included on MLS. If Pickens, you can go to the home listing in the county website- http://qpublic5.qpublic.net/psp/sc_pickens_mail2.php
and punch in the address and it will show you market and tax values, which you can use as a guideline (only).
I'm not a realtor but an investor who purchases in cash or different options, but I also utilize realtors. I'd be happy to talk to you if you are looking to sell and help (no commitment of any kind) any way I can, including finding the best value. You can reach me at 660-9009; Larry Scarborough Home Buying Investments, LLC