Seller paying for closing costs? First time property buyer

[Patrick Crehan]

I’m a first time property buyer and about to close on a prop. I am trying to negotiate a deal where we come up with price that is fair with me and the seller while getting the seller to pay for closing costs. But I’m confused on how we would know exactly what the closing costs would be if we came up with a number. Let’s say the seller wanted to net 102k. How would the seller know what to pay in closing costs down to a tee based on the net? Should I just assume about 3-4% of the prop worth in addition as the closing costs? Thanks