Whether you are an exisying XJ40 or X-300 owner, or you are new to the marque and model, you should seek advice before parting with your hard-earned money. You will find 'Guide Prices' here. There are a number of XJ40 or X-300s out there, some rather better than others, some more desirable than others. What can you do? Well if you are planning to spend a sizeable sum, you should consider having a proper inspection done. Motoring organisations can perform this service, but better to have someone who is thoroughly familiar with the model. JEC members can ask one of our experts for a detailed report. (see here) On a less formal level, JEC regional members can help sort the wheat from the chaff, before you get a report done. With a large number of XJ40 or X-300s in JEC members' ownership, many will have Club insurance and that includes 'Agreed Value', which may give some clue as to the vehicles true value (see here). Check out our up-coming XJ40 or X-300 Seminar here, part of the day is concerned with buying!   is our associated website, where you can buy and sell Jaguars.