Cheap ass people who refuse to pay for quality and/or experience always end up buying super cheap goods or services below the 'it's too good to be true' mark. Then when said goods break, fall apart, stop working, or they are not happy with the service they were promised, they are genuinely surprised and will bitch to anyone within hearing distance of them that they got 'ripped off'.
Literal meaning: if you buy a cheap product or service, 9 times out of 10 you will be disappointed as it will not live up to your (unrealistic) expectations. Get a clue and start buying quality stuff!
Sucker: "Dude, i got this Rolex Submariner for only $150 bucks off some black dude in the French Quarter. I can't believe my luck! Look at this bad boy, I'm gonna get all the pussy with this watch!"
Sucker's friend: "Dude, your wrist is turning green... and look at the face of the watch, it's crooked."
Sucker: "What the---, I think I got beat out of $150. This piece of shit prolly aint worth $5!"
Sucker's friend: "Well, you know what they say... you get what you pay for. Sucker!! hahahahahaha!!"