Luckily for the less wealth-enhanced citizens of today, the rights to the design itself are expired. That means anyone, anywhere, can build an identical piece and sell it for whatever sale price is appropriate.
Because these cheaper replica versions are not officially allowed to use the trademark name, they often go by the term "Barcelona-style Daybed" or "Exposition Daybed," so they can avoid the issues regarding name ownership while they go about their business.
This means that it's easy to find a cheap Barcelona Daybed replica for a fraction of the price, shipped right to your door, and ready for you to relax in style, literally.
So, where's the best place to find a cheap reproduction for sale? Well, if you don't have a modern design showroom in your neighborhood, your best bet is to buy online from Amazon or eBay. The latter often has cheaper options, but it's good to check both.