real estate agents?

[Stacey Steele]

I was contacted by a real estate agent who says she specializes in finding fixer uppers for her clients.  She says that she helps her clients find the property, helps with estimating costs and resale value, and she also has a team of subs she works with who I can hire to do the work.  She then guarantees that my property will sell within 30 days, in other words she finds a buyer for the property.  So...basically she does everything??  I am meeting with her next week.   

This sounds too good to be true.  However, I am very new at this, and I walked away from my first potential property over the weekend - not enough knowledge about costs and resale value for that particular property, even after studying comps for that neighborhood.  

Doing my homework, but would welcome thoughts.