I've downloaded information about all (at least I hope) properties and calculated some statistics:
| Area | Last Purchased Price | Yield per Hour | Price | Teleport Price | Return of Investment (original Price) | Return of Investment (Last Purchased Price) | Price Increase | |
|---|---|---|---|---|---|---|---|---|
| Minimun | 1 | 0 | 0 | 0 | 20 | 3,77358472642473 | 3,77358472642473 | -1 |
| Maximum | 1652 | 3601800 | 79,0900037565733 | 100000000 | 4079506792105109 | 3267973700,98873 | 1754399,91667185 | 0,250017362316828 |
| Average | 40,2025169969622 | 18034,3988514393 | 0,345295754170088 | 119777,751267178 | 295060523128,237 | 1005450,22247367 | 58754,4291110813 | -0,147131193369898 |
| Median | 24 | 4250 | 0,079200003761798 | 5440 | 40 | 49999,9976251276 | 49999,9976251276 | 0 |
You can find the raw data here: https://gist.github.com/henrydatei/26c00a54f6a77e79e22b17187fc1682f