I dunno about £300-400; diesels fetch more than petrols and 130k for a TD is practically showroom fresh
What colour, trim level, condition, etc is it? Good nick estate with a decent trim level could make over £600 I reckon
You're probably best off selling the plate separately - it won't add anything to the price of a 406 with the exception of coupes and driven-through-a-halfords-store modified jobbies
<steve_earwig> I think this forum is more about keeping our cars going with minimal outlay than giving our cars more reason to go bang