About three years ago I upgraded from a cheap MTB bike to an upright dutch-inspired urban bike.
For the equivalent of about $300 USD on sale, I got an aluminium frame, front and rear mudguards, internal 7-speed hub, extended handlebars, and all-weather rollerbrakes. They're nowhere near as powerful as diskbrakes, but they do the job.
The pie chart data is from a bike expenses spreadsheet I keep, was surprised actually to find out how little I've spent on maintenance, in comparison to completely optional accessories for the bike...
About my previous and current commuter
My cheap MTB had served me well for 4 years prior, despite being a bit neglected in the maintenance department. Don't get me wrong - there was chain cleaning and re-lubing after wet weather, replacing diskbrake pads and all that stuff, but it wasn't perfect and sometimes it was just plain tedious to do.
The upgrade made a lot of sense at the time, and after 3 years of owning the Dutch-inspired bike I've not needed to do much maintenance at all. However, it's a little difficult to get parts for the bike outside of the Netherlands, worsened slightly by the original retailer no longer selling consumables such as the rollerbrake grease and internal gear grease. Despite that the bike has been rock solid, still shifts and stops like new. I'll need to give the internal hub an oil bath at some point though - not looking forward to that...
My husband bought one of these when it was on Kickstarter for ~$1600, plus $300 for shipping.
My current non-electric was $300 refurbished. My pannier bag is $70, and I've got a trailer for when I'm taking my kid places that was $200 used (and $1000 new!).
It's hard to tell since it's a parts bin bike. I like to tinker, and have a habit of buying a different used frame every few years and swapping the parts over. The frameset and wheels are from Craigslist. I bought the shifters, crankset, and pedals new but they've been with me for many years. Most other stuff is used from eBay. All told, I would guess about $1,000 USD?
200โฌ for Decathlon Elops Speed 500, and another 100-ish for the lock, front rack, fender, lights. But now I can keep my bike inside the office, so I just ride my gravel bike.