I use a middle of the range 661 (Strike I think), usualy picked up whatever was last years model (i.e. paint scheme), think I only paid £35 per helmet (binned them after each big crash).
I’d rather wear an XC lid and take it easy than hire a helemt or buy 2nd hand!
Only problem is fitting, even between helmets of the same nominal size (i.e. i could in theory buy any helmet listed as 63cm) there’s a huge range of shapes even within brands (some 661 fit me perfectly, others there’s no chance) so mail orderings tricky (hence I’m still buying the same mid range helmet year after year).