24x36 frame with foam core backing and U/V protective lens cover for just a hair under $55 ($51.05 if you monkey with the settings right, $70-ish if you want all the bells and whistles): http://www.wholesaleposterframes.com/product_info2.php
Now... That website is ugly and hard to use. I wish it wasn't, but their product is great and by far the cheapest I've found that's not junk. I've order 15 frames since I discovered them a few years back, and they're great. The frames arrive incredibly well packed. They do require assembly, but it only takes about 10 minutes to go from unpacked to wall once you've done the first one or two.
You should also note that they are metal frames (they own the factory), but they have a wide variety of finishes and are very high quality. No wood options, though.
Now... That website is ugly and hard to use. I wish it wasn't, but their product is great and by far the cheapest I've found that's not junk. I've order 15 frames since I discovered them a few years back, and they're great. The frames arrive incredibly well packed. They do require assembly, but it only takes about 10 minutes to go from unpacked to wall once you've done the first one or two.
You should also note that they are metal frames (they own the factory), but they have a wide variety of finishes and are very high quality. No wood options, though.
No affiliation, just sharing the link.