i second @ArtFart's rec. i don't have an Intuos small, but i have an Intuos5 Medium (a lovely product, but above the $100 mark for sure).
anything by Wacom is good. i've bought two tablets by them, my first one was a small Wacom Bamboo which worked well for 3 years before i decided to upgrade, not because it broke, but because i wanted something fancier, haha. i think it's around $100, if you were curious.
to conclude... JUST BUY FROM WACOM (and look into their Intuos)