I have found both cheap tents and very expensive bivvy bags.

Spoons.

Not for eating with, but for playing.

May not sound like a prep item, but I’m a musician...you can never have too many playing spoons 😂

do any of you find stuff in alleys set out for the city trash and scrappers? I have come away with tents some almost unused along with at least one very good "like new" sleeping bag.
Coleman two burners are almost common.South Minneapolis has a lot
of retired folks and a canoes in the back yards tell me i'm
not the only camper around.

Wool Dress Pants, to use as Winter Clothing

Wool seems to be in fashion- finding wool pants and heavy wool shirts

I've scored a couple of wool-lined canvas duck chore coats at Salvation Army.

A new rolling duffel for a BOB.

Cast iron pans and scout "clamshell" cooksets for $2
-Blast

Spare pet stuff; water bowl for their BOB, leash, etc.

One great example are the larges duffle bags with the rolling wheels; a nice way to store and move gear. I keep my camping gear in one.