The price of anything classic with an Alpina badge on it has soared in recent months and they look to be pretty solid investments too. Only 500 of these B9 3.5s were built and this LHD automatic example is number 489. It was exported to Japan from new and was then exported to Poland later in its life, where it currently resides. According to the listing this is a very original car throughout, with the original book packs and a good history folder. £15k doesn’t sound bad and you’d probably be hard pushed to find another one, but I think the guide of £40k to £54k is high if not very high.