Realtor shocked I want to offer 100k less than asking price.

[Brian Zitzow]

So I just got off the phone with my realtor. I want to write an offer for 245k on a duplex that is in probate and asking 350k. He was shocked. He said he "knows it is worth at least 320k". It's tax assessed at 315k in 2015. 

However, the only way I could make the numbers work was to offer that amount. Yeah, I'm in California. Yeah, I realize people will probably pay more in California, but the numbers have to work for me. 

He had a meeting and said he'd call me back, but I got the impression he doesn't even want to write the offer. "I can tell you right now you're not going to get it."