Places to buy wall art, particularly art prints?

Of all places, I saw some very decent art prints in Nebraska Furniture Mart the other day. Large, seven-foot-wide modern art reproductions, as well as big art prints from photographs. Then, after I left NFM, I went over to Scheels and they had some as well. [Stuff like this very nice 6-foot wide triptych.](https://i.imgflip.com/8o5jsf.jpg) This got me thinking - where are the best places in Dallas or DFW to buy large wall art / art prints? Is it Nebraska Furniture Mart and Scheels? I know they have some at Ikea... But there must be some better spots? The prints I saw at NFM and Scheels ranged from $300 up to $1,000. Thanks.