I got an Intuos5 from eBay or Amazon because they don't make those anymore and it was highly discounted from its original price (which was originally upwards of 500+ dollars and I paid about $260.)
So, you can get one that is even smaller and don't be afraid to get a used one from a reputable dealer, and one that they don't make anymore because the drivers on their website are universal and work no matter what wacom you have.
Just because it's older doesn't mean it works any less.
If I can get a 50% discount on an amazing tablet that is brand new and works like a gem, I'm sure you can find one to fit your needs for around the 60 dollar range (even if it may be a bit small.)
You can look up their old Bamboos on eBay or Amazon, they'll be the cheapest.
//sorry for the long post I rambled on