There are several factors that can determine the pricing of data recovery services.

1. The type of device: The cost of recovering data from a hard drive is generally less expensive than recovering data from a smartphone or a laptop. This is because hard drives are larger and easier to work with, and they typically have fewer components that can fail.
2. The extent of the damage: The more severe the damage to the device, the more expensive the recovery process will be. For example, if the device has physical damage, such as a broken circuit board, it will be more costly to repair than if the damage is purely logical, such as a corrupted file system.
3. The type of data: Some types of data are more valuable and harder to recover than others. For example, recovering deleted photos from a smartphone is generally less expensive than recovering business documents from a failed server.
4. The amount of data: The larger the amount of data that needs to be recovered, the more expensive the process will be. This is because it takes more time and resources to recover larger amounts of data.
5. The complexity of the recovery process: More complex recoveries, such as those that involve multiple failed drives or highly encrypted data, will be more expensive than simpler recoveries.
6. The reputation and experience of the recovery service: Data recovery companies with a good reputation and a lot of experience will generally charge more for their services. However, these companies are more likely to have the expertise and resources to successfully recover your data.

Overall, the cost of data recovery services can vary widely depending on the specific factors involved in each case. It is important to do your research and choose a reputable data recovery company that can offer a fair price for the services you need.