You are wise to seek a REALTOR with residential investment property experience. The advantages, disadvantages, tax implications, etc. are quite different than owning a primary residence. There are so many variables. Too many to post here...
To find a REALTOR with residential investment experience (there is no official NAR designation for this), a referral from a friend or colleague is always the best bet. Failing that, contact a few of the most respected real estate brokers in the area where you are looking to buy. Ask to speak to the "broker of record". He/she should be able to provide the names of an agent or two with such experience. Interview at least 3 agents, then pick the one you like best!
Best of luck and happy hunting!
You do not want to be competing with your Agent on the same investment property. Choose an agent who doesn't invest in the same type of properties you are interested in.
Many agents will say, "YES, I work with investors" but truly are not qualified to.
Call around and interview.
Also, if you find an agent in a different area/state that works with investors see if they have a referral in your area. Many investors invest nationally so agents have contacts outside of their area.
You are going to have to get referrals. Do you know any successful investors in your area? If not start searching the web. Plus you posted here, so it is very possible an agent close to your area will also get you pointed in the right direction.