I have been to a couple of auctions. I am certainly not an expert.
See this link for Annual Delinquent Tax Sale Auction Details.
Delinquent Tax - Horry County Government
Keep in mind that even if you win the bid it is possible that the taxes will be paid before the year is over and you will not receive the property, but you will receive your money back with interest.
If the taxes are not paid in 1 year, you should get the property.
Do your research before bidding.
For "sales" that have completed the one year period and actually changed hands, you can see the details of the properties by going to the web site:
Horry County, South Carolina Tuesday, Nov 25, 2014. LAST CFN = 2014000140993 v4.3.0.0
Search Records: Name
Name: DELINQUENT TAX MANAGER HORRY COUNTY
or
Search Records: Legal Description/Memo
Comments: Contains "The Name of the property you are interested in"
to see all properties that sold in that neighborhood for any reason.
You might want to try the Foreclosure Auction conducted every month by the Master-in-Equity.
Mast In Equity - Horry County Government
If you win this bid, the property is yours. But once again, do your homework.
You may also have to pay back taxes and perhaps liens on these properties.