Back in 2010, Sharp turned its Touch Wood phone concept into a reality with a uniquely shaped device. It was shaped liked a pebble, clad with Japanese cypress at the back, and only 15,000 units were made but each handset had a unique pattern and colour. Talk about a collector’s item! As for the tech specs, you got a 5MP camera, a 3.4-inch, 854 x 480 display, and an expansion slot for up to 16GB of storage.
Alas, I couldn’t find any for sale on eBay to see how much one would be worth now but I suspect they’d fetch a lot. If you had one or touched the wood, let me know in the comments.