Learning how to make offers

[Bassma Mancilla]

Hi all, 

So, prior to learning about real estate investing, I had never purchased a house (still haven't). I've been making offers, and of the say, 50 deals I've analyzed, I've made like 10 offers thus far. Only one has gone under contract and that one fell through because of foundation issues. I usually offer 5-10k below purchase price for on market deals and ask for seller credits to cover closing costs. However, my agent has been sending me off market deals and says there isn't much room for price negotiations since the price given is what the seller wants to net. How should I go about making offers in this case? Ask for seller credits but offer asking? Any tips?