We say that because most already seem to be in single figures for stock on the site, so better safe than sorry.
As for the images, well, they are newly-discovered promotional posters. When the Heal’s family sold the retail business to Terence Conran’s Storehouse Group, the archive of promotional material was passed onto the V&A. However, during renovation work, more posters have come to light, with a small collection reprinted by Heal’s and being sold by the store in frames.
The images are printed onto handmade paper using fine giclee ink-jet printing and sold in solid, stained black ash frames. A large framed print is £45, while a small framed print is £25. But as we said, you might need to act quickly.