I wouldn't buy where the negative is excessive. 

Talk to people, ask questions, impress them with your willingness to work and learn.Remember, you will sometimes lose money, it's a shock the first time it happens.  

You should also consider that things can move in the opposite direction and potentially you can lose a that investment just as simply, so it is a riskier investment.  

You may lose some of the deal, but hopefully you won't lose your shirt.

During the bust, I got busy with a 100% DIY remodel of my current house to make it more attractive to the next buyer (or appraiser) and, thru my effort, managed to at least not *lose* any value when things tanked.

As far as knowing what you want and verbalizing it, from my experience the investors who don't have a solid plan for a house going in are the ones who lose time and money.

I think you've just got to make a gut call and be comfortable with the prospect of losing with either option - either because you went all in, sent it to their only findable addresses and risked pissing somebody off, or because you chose to avoid that possibility and missed an opportunity.

I have to say all the hassle was worth it because i didn't lose money on the first deal!

An LLC may offer additional liability protection, but it's easy to lose the protection if you're not careful with your business.  

It sounds like you are acquiring a bunch of properties right now and if that's the case there's no point as you're not paying your agent anyways and aren't losing out on any money.