There was a time, however brief, when it was believed, and hoped, that tablets would get cheaper, as in sold for less than $400-500. Google's Nexus 10 tablet, made by Samsung, shows that those hopes have been dashed completely.
Device manufacturers would have probably made at least a token effort to market less expensive devices if Microsoft and its partners hadn't chosen to sell their Windows 8/RT slates for $600 or more.
As it is, the 32 GB Nexus 10 bears a tag of $499 / 499 Euro on the Google Play store.
At least it definitely has advantages over the competition: a display of 2560 x 1600 pixels (the current iPad has 2048 by 1536 pixels, most others don't even have 1920 x 1080) and the Android 4.2 Jelly Bean operating system (many are still stuck on Android 4.0 and 4.1).
Those interested will have to make a quick search on Google Play
and make an order, assuming the device is available in their area.