similarly, i own domains that i've used in the past that are now sitting dormant. i don't want to let them expire and immediately get snatched up by a squatter

similarly, i own domains that i've used in the past that are now sitting dormant. i don't want to let them expire and immediately get snatched up by a squatter, so what am i to do? if i put up a "for sale" page on them, am i a squatter now?