Do you mean second-hand or new?
Second-hand, you pay more (£1,000+) for early models, custom shop and anything neck-through. Early- to mid-noughties models with chunky necks tend to be less sought-after. They still aren't trendy items second-hand, partly I guess because right now passive Fenders are what 'the kids' are into and partly because the oil finishes can look icky if not properly cared for. Some models are probably more popular than others but it's in the eye of the beholder, really. Chinese and Korean instruments can be found for not much moolah.
New, you pay sky-high dollars for Custom Shop basses, £1,500 upwards for 'German Pro Series' (parts sourced from various luthiers and assembled on the German production line) and anything up to £1,000 for Chinese Rockbasses.
Hope it's helpful and reasonably accurate.