I realize that it's probably prohibitively expensive to get one to you,
but, if anyone ever wants to ship a gift or you can pick one up on
travel, it's worthwhile. If you are reasonably handy, it's also possible
to build them from wood, a light bulb or two as heating elements, and a
small fan == a thermostat is very nice, and if you have to order one
item, they are small.

It's one of the most useful appliances I've ever bought. These days, I
regard it not just as a means of preserving, but as a distinct cooking
technique, or at least of making cooking ingredients. Gentle dehydration
can really concentrate the flavor of many fruits and vegetables. I'm
thinking more of Western plants, but banana, jackfruit, etc., probably
would work. I don't want to speculate about durian.  Oven-dried
tomatoes, either plain or herbed, are better than anything I've ever
bought in a store.

You can puree various vegetables, dry them, crumble them into powder,
and use them as sauce bases. Milk and celery powder makes something
similar to a white sauce based on chicken stock -- it's one sauce I find
useful to make brussels sprouts taste good to people who hate them
(parboil them very quickly first). Dried broccoli is a nice crunchy
snack, but I've only really gotten decent cream of broccoli soup using
the home-made powder.

There are other uses. At least in temperate climates, it's very useful
for keeping things just slightly above room temperature, such as bread
dough rising or yogurt fermenting. When you use it this way, wrap the
food tightly so it doesn't dry in an undesired way.