I agree, dont budge… shows weakness and being unsure. If i think a price will end up being higher than they would like, i make a point to highlight what is included other than the house (steps, porch, etc) and will typically throw in a shed. Normally wont throw in and flat work, but will offer it to them for a discounted price.
With that said, i do cut people a small price break with cash payments. Taking a $30~ trip to the ATM seems to hold value with customer