So I have to either accept that the market has shifted, or else be content with the leftovers that the serious investors have rejected. 

However, if you're buying a turn-key property and not going for a value-add strategy, I would be wary to accept anything less than 20%. 

I got approved by local bank here for 70% of the purchase price, so I would need to come up with the 30%.I also put an offer on a property and got accepted.

Once the offer is accepted, is there anything else that a realtor would provide that would save us headache?  

If my offer is accepted, what are the next steps in the process?

Would you accept that if you were the cash heavy end of the partnership?

I agree, it's very hard to find an agent that both understands and wants to work with investors; it seems that most agents (rightfully so in many cases) think that they're going to spend bunch of time looking at houses only to put lowball offers in that aren't likely to be accepted.

Far too many people (whether it be fear, pride, or otherwise) refuse to accept that action can often times be far more beneficial than non-action in regard to repositioning their interests, so bravo to you for doing so.

You have to learn when and how to accept and/or pass along certain types of risk.If you don't understand it, don't try it. 

Conventional loans are easier to accept as a seller, because FHA comes with more rules.