It is unwise to pay too much, but it is even worse to pay too little.
When you pay too much, you lose a bit of money, it is true, but that's it.
But when you pay too little, you risk losing everything because what
bought is not able to do the job for which you had purchased.
The common business law denies the possibility to pay a little and get
much: that can not happen.
If you deal with the less expensive seller, it is good that you provide a certain reserve
to protect yourself from what you risk.
But if you do so, you will certainly have enough money to buy