I am contemplating the purchase of a used 5 Series BMW with a budget of £20,000 - £22,000. Looking on the Autotrader website I notice that there are a number of companies offering new, high specification 525SE Auto saloons with leather at between £21,500 and £22,000 (list price £35k+). I work on the basis that if something looks too good to be true it probably isn’t true. Are these genuine offers? And what are the pitfalls of purchasing one of these vehicles?