Your set of nesting tables are indeed made of teak and judging by the style and detail of the carving, date to the early 1950s, so are approaching 70 years old.
They are typical of their kind with carved intaglio vignettes under the glazed top and on the apron, depicting oriental scenes.
This type of furniture, made exclusively for export to the West at the time, is a bit of a hard sell at the moment and so prices are not that great. This will change, as antiques, like everything else are subject to the pendulum swing of fashion.
This example, for instance, of four Chinese nesting tables, where the carving is more extensive and elaborate, sold at auction earlier this year for $100 which even so is on the low side.
If you were to sell yours at a local antique auction they would fetch in the range of $100 - $150 for the set of four.
They therefore have a full retail value (if you saw them for sale in an antique store, say) of $300. This is also the replacement value for insurance purposes.
I do hope this helps!
Please let me know if I can be of further assistance with this, I would be glad to.