Why not go for one of these unnamed chinese ones? They're just as good as the branded ones, especially if you only do a few things on them. Just make sure you get a tablet with at least 512mb Rom and Ram and a capacitive touch screen, not resistive. The cpu needs to be at least a cotex A8, better even an A9 class. Plenty of choice and you would only have to pay around hundred to hundredfifty dollars. We've got one and it's working great.

Artwork and 3DToons items, create the perfect place for you toon and other figures!

http://www.renderosity.com/mod/bcs/index.php?vendor=23722

Due to the childish TOS changes, I'm not allowed to link to my other products outside of Rendo anymore :(

Food for thought.....
https://www.youtube.com/watch?v=pYZw0dfLmLk