Bought some replacement struts off Amazon, Gabriel G55726, and have installed them.
When the old ones came off they didn't really have any rebound. Pretty much would stay put wherever you put them. I'm guessing that indicated they were shot? Had 100k on them. I suspect they were original.
The replacement ones are completely extended at rest. They push down with resistance as you would expect. It seems though that when installed there's not enough weight to compress them and they stay at their full extended amount. Is that right? When I go over bumps they "top out" I can hear it.