Hi Sheba,
That really depends on a several things.
The first of these is how you define “natural” and on where you are most comfortable inside the natural/synthetic range or materials that are available and on whether you are looking at “natural” materials for their own sake or whether you are using “natural” to mean “safe”. For example the mattress you linked uses blended Talalay latex which is certainly a very high quality and durable material but the latex it uses is about 70% synthetic and 30% natural. There is more about the different types and blends of latex in post #6 here.
The second is that the price of a mattress is only one of many factors that are part of the “value” of a mattress purchase (see post #13 here). To take a more extreme example just to make the point, you could purchase 3" of latex with an inexpensive cover (more like a topper than a mattress) that would be considerably less costly but it’s unlikely that it would be a good match for you in terms of PPP (Posture and alignment, Pressure relief, and Personal preferences) and if you buy a less costly mattress that you don’t sleep well on then it would have little value to you regardless of the price.
Your best chance of success would be to follow the steps in the tutorial post one by one so you can better “define” the parts of your personal value equation that are most important to you including but not only limited to the price.
The tutorial post also includes a link to a list of the online manufacturers that are members here that sell a wide range of latex or latex hybrid mattresses with different options, price ranges, designs, and return or exchange policies.
Post #3 and #4 here also includes some of the lower budget latex or latex hybrid options that may be worth considering.
I think very highly of Arizona Premium / mattresses.net and they are certainly among the lowest cost options for an 8" all Talalay latex component mattress and would certainly make a great choice but you have other good and “safe” options available as well if “all latex” or “100% natural latex” isn’t the most important consideration.
Phoenix