I think the term "accurate" is incorrect for prices. This term is applicable to analytical data. Price info is interesting for persons who want to sell own catalyst in some recycling service and wants to know the order of prices. For example Lexus complect GD3 + EA6 is very expensive, but diesel filter with serial 3M51-5H221-AD (Ford Focus 1.8 dci) is empty and this filter will not be bought by any recycling service.