This was purchased out of idle curiosity during a discussion in
another thread.
As mentioned there, this is the 'deluxe' DT-830D variant of the infamous DT-830B meter, and boasts a (scratchy) continuity buzzer.
The meter cost £1.95 including postage in the UK. It was sent via 2nd class 250g Royal Mail large letter post, which costs £1.17, and included a PP3 battery. The cheapest zinc chloride PP3 batteries I can find are 50p, so the multimeter itself effectively cost 28p, or about 40 cents US.
The (new and boxed) meter:
As you can see, this apparently boasts "new improved quality", which does make one wonder just how ghastly the old model must have been.
Because this is the rather horrible interior:
The only discernible input protection appears to be a 200mA glass fuse for the low current range.
The battery terminals have no polarity marking and the battery fits either way round...
[EDIT] Here is the backside of the beast, by popular request:
As is often the case, DC voltage reading on the meter was pretty accurate:
Since it would clearly be dangerous and irresponsible to use this meter for measuring anything higher than about 30V, I connected it to a 1000V power supply:
...which it seems to have survived.
Incidentally, the vendor sold eight of these in very short order after it was mentioned on this forum, and has now jacked the price up to £2.95.