A company that I work for bought a website theme for their new customer portal. I don't really know the requirements and what was supposed to be included, but the price was somewhere in the ballpark of 200,000 SEK (21,000 US dollars). It contains lots of bugs and issues that I don't think they'll be able to solve.
Add 1 MB of custom CSS. In addition to Bootstrap, they added CSS that can replace almost any
style="..." attribute. How, you ask.
font-size: 52px !important;
font-size: 54px !important;
/* ... */
For every property, they'll add utilities for lots of possible values. So you can vary
font-size between 6px and 100px.
Keyboard navigation. They removed Bootstrap focus rings in most places, so tabbing is impossible.
Automatic reload on resize. When you resize the viewport, the whole page reloads. This includes switching between landscape and portrait mode on your mobile device.
Lots of minor issues. The charting library doesn't show all values when hovering the graph. If two lines are at the same position, only the one "on top", will display its tooltip information. The carousel works poorly if images for some reason don't load. Then you can't see which slide you're on. And so on...
I genuinly hope that they refuse to pay for this. It's basically unusable.