There are a few payment structures offered by property advisory firms in London, and I have to say, each has its own benefits. For instance, a fixed payment structure can be great for anyone who desires a straightforward approach.
You simply pay a fixed fee once, and you're done. Hourly rates, on the other hand, can be great if you don't want to overpay or underpay. You simply want to pay for the exact hours that were put in doing the job for you.
Lastly, there is also a percentage-based fee structure, wherein you pay depending on how good the investment is. The higher your return on investment, the higher your hiring fee. Lastly, it is also possible to combine fee structures when hiring a London Buying Agent.
This way, you may pay an initial consultation fee that is fixed, then the next round of fees will be hourly or based on performance.