Are you asking for an agent referral?
I'm a loan officer, so I can give you a recommendation from my experiences, rather than telling you to just use me. I've worked with the following realtors who are extremely knowledgable of the area and do a lot of business in Thurmont:
Ray Miller with Remax http://www.rlmrealty.net/
Darren Ahearn with Real Estate Teams http://www.darrenahearn.com/