Usually, the most expensive parts of a consumer-grade computer are the graphics card and motherboard. Ultimately, you can find very expensive versions of any component, so the parts you choose will have the biggest impact on how much they cost.
QuickBooks is professional software that is regularly updated, upgraded, and professionally maintained. Producing and maintaining the software requires a lot of time and money from the developers, and they pass those costs on to consumers. Additionally, there are a lot of different versions at different price points.
Computer data recovery is expensive because it is difficult, involves expensive tools, often requires professional expertise, and is in high demand. The actual cost of any service will depend on what is required to salvage the data. That’s why the service can range from hundreds to tens of thousands of dollars.
The price of a laptop docking station is mostly going to depend on the range of features available and the overall quality of the device. Compared to simple USB hubs, docking stations provide more support for the laptop and cost more to make. Still, docking stations can range from tens to thousands of dollars.