Best results iv'e had are Gumtree...
Search bass guitar, distance i can travel, price low to high, see what is in budget, see what i like... do some research.
Ibanez GSR200... already had one, couldn't leave it at the price.
Ibanez SR600... couldn't leave it at the price.
Ibanez SR300... couldn't leave it at the price.
Also worth a look in local Cash Converters.
Others are Bitsa's following custom bodys