I recommend oldies and very affordable ones for beginners. You can add more expensive ones later if you like. Honestly I have some I paid a lot for and some I got for $5 and those cheapy ones end up being my favorites. The price will have no bearing on whether you like it or not. I had some pricey ones I didn't like the looks of and tossed 'em out !
Here are some links to nurseries I've used and are very affordable and have a great variety of nice things.
http://www.homesteadfarms.com/
http://saksadaylilyfarm.com/t/...
http://keastdaylilygardens.com...
http://www.ogdenstationdaylili...
