Ask any buyer if he/she would like the price to be cheaper and they'll say yes.
It's not really a negotiation. The bank sets a price and you can put in a higher or a lower bid. Some set a base price and will not deviate from that.
I don't know if this will be helpful but my first home was a cannibalized repossession that was foreclosed by an out of state bank. It was going to be a sweat equity project if I got it. AFAIC, being out of state was an advantage to me since they had no local agent. I believe that I had two edges.
The first was that I was able to correctly identify what needed repair and how much it would cost and that allowed me to determine fair value and then I low bid.
The second was just good luck. I chatted up the out of state agent and when they had some difficulty getting the key to a few prospective buyers and since I rented nearby, I offered to be the local drop off for the key. When it got down to the wire, the agent let me know that I was 2nd lowest bid by $1k and I raised it a bit more. The previous high bid did not raise and I got the house at a great price and it was below the bank's initial ask. I assume that the price tip off might have been due to helping the agent out because of the other foreclosures I have purchased, no one ever divulged anything other than "You're not high bidder."