Can you show an example of what are beautiful curtains to you? It will help people who are trying to help you. Also knowing your budget and what colors or prints you are looking for will help.

I often buy mine at Overstock.com. They have good prices and I have always found wonderful curtains on their site.

If you want to spend more there is always Pottery Barn, Restoration Hardware. Horchow etc.

Urban outfitters, anthropologie, jcpenney

Wayfair has lots of trendy curtains for decent prices. You just have to be careful in your choices as return shipping can be high.

Gaby, what are the websites you've checked that weren't successful for you? And as My3dogs suggested, seeing some examples of what you DO like would be helpful.

Seconding Ikea, Urban Outfitters, and Anthro (esp when they have a sale).

Country Curtains is having a going out of business/closeout sale, if that helps.

Etsy. Got mine custom made and they are very pretty!

West Elm

Smith & Noble (Madcap Cottage collection if you like bright colors). Silk Trading Co.

College student budget? IKEA is your friend. Or, for any budget when it comes to good quality drapery panels, especially their linen and velvet ones. You can't beat their prices, and the quality for those items is excellent. You would need to look elsewhere for drapery hardware, however, as they don't offer comparable quality for rods, brackets, etc.

Marshall's has some nice curtains for a good price however not a lot of inventory or large selection.

Amazon has amazing curtains.