Well I know what you mean, I had a 'shock' (not the right word), or 'didnt realise' moment on two things from reading threads on this site
One was someone asking whats the most expensive item you're wearing. Well I dont wear jewellery and at the time I read the thread I didnt have a watch (now I do, its only 50 quid)
Most of my clothes are from charity shops or Sainsburys or similar supermarket price point clothing apart from some I buy in Italy and Spain and some high end things here
So I was thinking, well I think my most pricey item is around £30, probably less, although I do spend over 100 or so on most shoes
And it was a shock/surprise to remember that my glasses, due to my prescription and adding reactolites or reactions or whatever they're called are around £300 a pair. Thats the most expensive thing I was wearing, hugely costly, no way round it and that was even with buy one get one free, due to the coatings needed, the lens thinning, the reaction sunglasses needed etc etc
My other 'didnt realise' was when someone was talking about how many thousands they paid each year for a holiday, we dont go on expensive holidays, just flights and an airbnb, but we go on lots of holidays so overall, I totted up that we spend around 6-9k pa on holidays dependent on the year. I dont mind, we enjoy them, I just hadnt realised it was that much.