I have worked with realtors and was one at one time. They're not all bad. LOL. I was certainly very honest and my goal was always to bring the seller and buyer to a place where both were happy. They have a code of ethics and can't do certain naughty things legally or ethically or they'll be tossed out of the association of realtors, lose their license or get thrown in jail, in which case, they are pretty well screwed. There are real estate agents and there are realtors. Make sure they have a big "R" for Realtor. I've bought and sold houses several times, for my own place to live and as investments. Realtors usually do a better job imo than appraisers as far as arriving at a market price because they are very familiar with that particular area and deal with it all the time. So, if the seller asks for a few market analysis's, for you and him that you can see the comparables they'll print out for you, that will give you an idea if he's asking a fair market price. It would be a really bad investment if you pay more, so it's really important to have a good feeling for that.
I'd sit down with a mortgage representative and see if you qualify, what you'd have to do to prepare for a loan, if you're going that route. You might be able to do some things to improve your credit rating and income to expense ratio. They're very good at helping you prepare since they know what they'd require or a bank etc. You need to be able to satisry whoever is giving you a loan. Mortgage co. usually offer better deals than banks when it comes to real estate loans.
Don't be afraid to use these professionals. Go through a reputable company and trust your instincts when you meet them. You should also use a real estate attorney or realtor as a buyer's agent to make sure your contract is protecting you. Just recently, I've dealt with a few realtors and one who was the final one I used in my purchase. She was a lovely person...someone I'd want to know socially. She knew her stuff, was helpful and very honest.