It's unwise to pay too much, but it's also unwise to pay too little.

"There is hardly anything in the world that a man can not make a little worse and sell a little cheaper.  And people who consider price alone are this man's lawful prey."

"It's unwise to pay too much, but it's unwise to pay too little too.  When you pay too much, you lose a little money...that is all.  When you pay too little, you sometimes lose everything because the thing you bought was incapable of doing the thing it was bought to do. 

The Common Law of business balance prohibits paying a little and getting a lot...it can't be done.  If you deal with the lowest bidder, it is well to add something for the risk you run, and if you do that, you will have enough to pay for something better."

~ John Ruskin 1819-1900