If you are looking for an amplifier and is kind of short to buy a new one, you can always opt for amplifiers that are already used. Most 2nd hand amplifiers are being sold because the owner would like to update their system, or needs to look for another amplifier that would suite their music rhythm.
These amplifiers being sold on music websites are often tested before they are tagged as for sale. And what is great is that you can buy one of those in a very cheap price.
Check out some of the second-hand bass amplifiers online at Musicians friend.