I believe this one is from the 1980s, but I'm not entirely sure.
The setting for this is NYC or some other large American metropolis. The protagonist lives in a high-rise apartment complex. The man receives a knock at the door, and someone or something offers him the chance to have three wishes. I'm sketchy on this point. I think it's an imp or something like that telling him Hell is offering people a free trial for people who might want to sell their souls down the line, but that could also be from another, much more serious, wish-themed short story.
In any case, the one catch to the wishes is that whatever the man wishes for himself, his worst enemy gets double that wish. The imp tells the protagonist the name of his worst enemy. As it turns out, it is actually his best friend, who lives down the hall. The protagonist is incredulous that this could be his worst enemy. He accepts the proposal, and begins planning his wishes.
The man first asks for a sum of money ($1000, IIRC). He is overjoyed at the winnings, and is able to brag about it for a time. He soon hears about his best friend getting twice as much, and all his good fortune. This creates jealousy in the protagonist, and sets the stages for a growing enmity towards his best friend.
The second wish is the "impulsive wish" trope. The protagonist suddenly wishes for 50 pounds of chopped liver. It arrives at the door, and the man happily takes his share, gives some to friends, and sells the rest for a tidy little sum. Of course, when his friend gets 100 pounds of chopped liver and makes even more friends and money from it, he is furious.
The man spends the remainder of the story thinking of how to use his final wish that will really stick it to his now worst enemy. He comes up with this in the final paragraphs. The protagonist decides he's been a bachelor too long, and wants a wife. Not just any woman will do, though. He lists out details of physical attractiveness, education, intelligence, and so on. The final detail is that she must be the absolute limit he can physically endure in "intimate matters." The story ends with the a tapping at the door and the protagonist reveling in the knowledge that his friend/enemy now has to deal with twice that challenge.