well I am trying to rescue some - especially those with cosmetic problems (just a few) or those with slightly uneven edges - nothing wrong per se but a buyer might think they were 'warped' when in fact it's just a very old grinding machine wheezing out heaven knows how many blades and it has had the odd 'hiccup' now and then. Then there are the ones that are truly bad - warpage, cracked blades, chipped etc etc - might save 'em for a few years, cast them in resin and sell them as paperweights.............