Angels in this life you will find you get what you pay for.
Pay for a bargain computer and you are going to get the cheapest computer its possible to make.
Your going to get older slower cpu, older slower ram, same for hard drive.
In short your getting the left over parts that no one else wanted.
There is a reason its cheap.
Now if you have a few parts and some patience, and can wait while you earn a few more dollars.
For 5-700 $ you can build a very good computer that will last you for years.