Sal wants a small tablet for displaying photos. Leo says that iPads are always the best tablets to get; far superior to Android tablets. An iPad Mini would work as well. In fact, Google has given up on tablet development. That's a clear sign.
But there are a few decent ones, including Walmart's Go tablet for under $150 called the Go. Samsung's Galaxy Tab is around $200. Then, there's the Kindle Fire. But honestly, the iPad is really the best way to go. But the cheapest is $329. But you'd be happiest in the long run. Also, check Apple.com for their refurbished models.