I would recommend a HP Touchpad they are going for as little as $99 if you can find one in the US. And their are efforts out their now to get Android on the device failing that look on ebay for a tablet or a second hand ipad 1.
If you really want an Amiga tablet I would recommend getting it from Icontain store more than Amiga.com
http://www.icontainstore.com/products/Xpedio-8%22-Tablet.htmlBut I would be careful as on Amiga Inc facebook page already one customer is complaining where his tablet is, luckily protected by PayPal.