Different people have different ideas of what is cheap and what is dear.
Sometimes its about having the right tool for the job rather than the price. We have a pretty good footpump to blow up car tyres. A couple of years ago my wife bought a
Halfords track pump for our mountain bikes. I grumbled about it at the time, because I thought it was unnnecessary - the foot pump was fine. Since getting my roadbike though I'm really glad I have it. It hits 120 psi very quickly and is used regularly. Now I just have to sort out a jersey pocket pump, as the cheap one I have is rubbish.
For lights I got a Smart 25 set for my roadbike. Around £30, great rear light though not entirely waterproof, good front light, but not bright enough to light up the road ahead when out of town. For my mountain bike/commuter I got a Lidl set around £10. Front light is halogen and rechargeable, rear light has leds, no flashing mode on either. Both sets do the job I want them to do - but if I could only have one I would say the Lidl set is better.
When I started cycling I thought I had entered a strange parallel world, where all the normal rules on pricing do not apply. I do not buy many clothes at all, preferring unbranded clothes - I hate displaying logos! So I cannot believe that people will spend £250 on a waterproof jacket. That is as much money as I spend in a year on all clothing. Yet somehow I've got a strange hankering after a top-end cycling waterproof. I'd really like a £100+ one, just to see if they are as good as people say they are. So I'm getting sucked into this strange new world in which I find myself.
I have a long list of cycling gear I want and an idea of the price point I would like them at. I'm prepared to scout about for bargains and build my kit up gradually though. One good thing - I've always been a nightmare for anyone who wants to buy me a present. Cycling has certainly turned that around!