You know I've said it here before :)
For years, I've been using inexpensive calendars to achieve the look of expensive art prints. Some sets with original prints can be seriously pricey, especially when you are talking about 6, 9, and 12 piece, framed sets. But if you hunt for it, you will find fantastic calendar art for an amazing price! The key to keep in mind is the print quality...for instance, Anthropology prints on a non-glossy paper.
I picked up this calendar on clearance at Anthropology while my kitchen renovation (forced kitchen renovation) was in full force. I paid $11 for 12 prints...SCORE!
They are the PERFECT complement to my kitchen.
If you're into the print look but haven't been able to find what you're looking for in your price range, I'd suggest checking out two things:
2. The BOTANICUS website, which is full of free botanical downloads that you can print and frame. I wrote a post about how to best use BOTANICUS including some examples and links, back in December.