Yes. I believe it is.
If a house is in such a horrible neigbourhood that it doesnt justify an extra 300-500 dollars for a fridge, I then rather question if the house is even worth flipping.
You are competing with all the other houses on the market.
Take our flip from last year
We bought it for 64.5K.
We were going to list it for 250K but because of our awesome finishes we decided to list it for 299K
We sold it for 335K
People think it is the expensive stuff (expensive granite or fancy cabinets) that sells a house.
Wrong! It is the small little finishes you don't HAVE to include, that get buyers thinking "oh wow, these guys reay went a out, to the smallest of details." We market the house " rehabbed as if we were going to have our mom living there".
As I said. you are competing with everything that is on the market. If you cheap out on a damn fridge for 300 dollars... what message are you giving your buyers?
Stay within budget but make the house special. The way I do it is I put in sweat equity. I do a lot of the unusual additions myself.