Buy an instrument,  which meet your own requirements if you know what you needs are. 
 
Talk to Mr. Adrian Maruszczyk he is a nice man and he will guide you. 
That is the Cheapest way. 
By getting it right the first time, you will not need a new bas after 6 month. 
 
I just love my Maruszczyk Elwood and I have had for about 1,5 year know. 
 
Best regards 
Svend