A friend of mine recently tried to give an old kitchen table and chairs (which he'd had from new) to SVP and was told they weren't interested in furniture, too bulky etc. I'd doubt they'd be interested in kitchen units, they'd have to be transported, refitted etc. sounds like a lot of work. Would you try putting a notice in the local supermarket etc. along the lines of "... would suit for storage/ worksurfaces in garage or workshop" maybe? I recently replaced my (very grotty) kitchen and ended up cutting it up for firewood mostly, I did hold onto a couple of units for my workshop. It's ashame to dump units which are basically sound. How about the local youth club/ boy scouts etc?