"The desirability of and/or your need for an item at a garage sale will be in direct inverse proportion to the likelihood of your actually being able to purchase it."
The four most common/infuriating occasions when Murphy's Law of Garage Sales holds true:
(1) A desired item is something that's just stored in the family's garage; it’s not one of the items for sale.
(2) The item has already been sold, and the homeowner is just “holding” it till the buyer gets back with either the money or a vehicle to transport the item to his own home.
(3) The item is too expensive, and the seller will not budge on the price. (Note: this is not always an "all hope is lost" situation --- you may have at least two additional options. First, try coming back again later in the day to see if the item is still unsold --- if YOU think that the item is overpriced, then most OTHER yard-sailers may think so, too, and so nobody else may have bought the item yet, either, giving you a second crack at possibly purchasing it at a reduced price, especially since by now the seller may likely feel a bit "desperate" to get rid of it. And second, have a glance at the trash-heap out front of the person’s house that evening --- sometimes unsold yard-sale items will simply be tossed out, and so you can then get them for free.)
(4) The item is something that you would logically want to test out first to make sure it operates satisfactorily, but there is no hookup for electricity/water/telephone/internet/antenna/audio/video at the site of the sale, and the stubborn owner will not allow you to either bring the item into his house or temporarily take it somewhere else to test it.
(1) A desired item is something that's just stored in the family's garage; it’s not one of the items for sale.
(2) The item has already been sold, and the homeowner is just “holding” it till the buyer gets back with either the money or a vehicle to transport the item to his own home.
(3) The item is too expensive, and the seller will not budge on the price. (Note: this is not always an "all hope is lost" situation --- you may have at least two additional options. First, try coming back again later in the day to see if the item is still unsold --- if YOU think that the item is overpriced, then most OTHER yard-sailers may think so, too, and so nobody else may have bought the item yet, either, giving you a second crack at possibly purchasing it at a reduced price, especially since by now the seller may likely feel a bit "desperate" to get rid of it. And second, have a glance at the trash-heap out front of the person’s house that evening --- sometimes unsold yard-sale items will simply be tossed out, and so you can then get them for free.)
(4) The item is something that you would logically want to test out first to make sure it operates satisfactorily, but there is no hookup for electricity/water/telephone/internet/antenna/audio/video at the site of the sale, and the stubborn owner will not allow you to either bring the item into his house or temporarily take it somewhere else to test it.
by QuacksO August 1, 2018

by Johnnyon the spot July 26, 2022

"You can follow an 'unpopular' method or procedure 'till da cows come home' and nothing unusual will ever happen to 'justify' or 'vindicate' your unorthodox actions (and you'll likely get continually criticized by others for your chosen behavior), but then the ONE TIME when you eventually 'cave' and actually DO happen to follow the 'standard' or 'acceptable' protocol, THAT'S the solitary 'rogue occasion' when disaster will happen to strike --- something really bad will happen that would not have occurred if you had simply continued to follow your own 'pet' procedure that had seemed better/safer to begin with!"
My "super-long-term-driving-experienced" aunt had gotten fed up with my "back-seat driver" attempts to be helpful by telling her about vehicles that I'd see moving around fairly near our position when we'd be travelling someplace in her car, and so she had eventually asked me to just keep quiet and let here handle the driving herself. Well, of course, within a day or two, Murphy's Law of Exceptions decided to turn and bite me in da butt --- due to a view-obstructing sidewalk-mounted ad-sign, my aunt didn't notice an approaching car, but I did... naturally, that was the ONE TIME that I **didn't** tell her about it because she'd specifically asked me to keep my trap shut on instances like that, and so I'd ASSUMED (there's that word again!) that she'd observed the vehicle bearing down on the intersection. Well, as you might expect, we crashed, and there were multiple injuries in the other car! Can't win...!
by QuacksO March 9, 2019

by fxlesaint December 2, 2019

"Ye right just had to do it, and we had to give ya the Cillian Murphy to get ye out of our damn country."
by MdstandsforMYDICK July 1, 2023

Someone who utilizes the "reliable" bad-luck-causing syndrome of Murphy's Law by actually turning it his own benefit or that of his friends. Extra points if these other folks actually hire him for pay to "suffer on their behalf".
One excellent example of a Murphy's Law opportunist would be someone who hangs out his laundry to dry on an occasion when rain is desired.
by QuacksO August 11, 2019
