Do not get a brand new sledge hammer and start busting the cabinets and counter tops to pieces! (Like the idiots on TV) Its all screwed together take them down and sell them! Those older cabinets are quality stuff.
Agreed, and do the tear-down yourself. For two people it's a piece of cake. You may need a plumber to cap off the water supply lines. I did mine a few years ago and they quoted me $3k just for the demo, did that myself and recycled the cabinets.