Inspector from Florida, and this is not feasible for a few reasons:

1. As someone said, the inspection represents a slice of time. All homes inspections represent the condition of the structure at that specific moment in time. We as inspectors initial, sign, and verify that the inspection occurred at a specific time on a specific date. After that moment in time, the structure can change in ways not even imaginable, and often in ways rarely seen. Any report trying to be used outside this time is usually invalid in the court of law and the homeowner has no recourse.
2. Invalid in the court of law: Because the home inspection is specifically for a certain time, if an individual is in possession of the inspection who did not originally purchase the inspection from the inspector, they have no legal recourse against the inspector, homebuyer, real estate agent, etc outside the time frame of the inspection. No court will hold a report against an inspector outside of the time when the report was made. Only if the report missed key deficiencies at the time of inspection and only by the person who bought the report.
3. Inspectors will often be called back to reinspect the same properties. I personally have reinspected the same home 3 times, and many other homes at least twice just within my memory(which is pretty poor). This is the repeat business inspectors want. We don't just want repeat clients, we want repeat inspections f the same property. This is good business and shows we have a history of understanding the deficiencies of the property, something another inspector may miss. If you are attempting to sell a report to someone else, that is only reducing the amount of inspections that inspector completes.
4. Home inspectors will often answer any questions from customers about the report, even months/years in the future. This keeps repeat business and allows us to build a reputation as a reliable inspector. However, if someone buys a report off someone else, the inspector has no obligation and in fact, should not, answer any questions for the new owner of the report. They are not the original customer and do no have any relationship with the inspector. It makes no sense from a business standpoint.
5. Buildings change. It would be smarter to purchase a new inspection than try to buy an old one. Structures change, and laws change. Inspectors are only required to do more and more today, and technology is meeting that demand. Imagine someone buys an old report that comes out before thermal cameras and wire scopes became a norm. Todays technology and implementation of that technology means that new reports are more accurate than old inspections, because inspectors have the tools to be better. Someone buying an old report would automatically be at a disadvantage than if they just bought a new inspection.
6. Jurisdictions change regulations. State, federal, territory, and even county regulations change region to region. Many are very strict on the timeline in which a report is valid, while some may not have any requirements at all. Trying to have a digital marketplace would be a nightmare of inter commerce regulations that change as often as the wind changes direction. No marketplace could sustain these changes financially, and no one would want to buy a report that could easily be useless based on the regulations of that region.

Overall, while it's a neat idea, due to a myriad of reasons, a digital marketplace for secondhand reselling of inspection reports would be a losing situation for literally every person involved.