Someone dumping some shit might well have had some of the objects much longer than some of the others. And if anything, a person is less likely to be dumping new objects, except for disposable things like beer cans.

I don't know the exact model of the cassette player, but the silver plastic and the rounded bits of the design to me are very late 90's to early 2000's.

My guess is this stuff has only been out there a few years from the general condition.

That ball is way too inflated, it has not been sitting in the sun for over a decade.

Looks like the speakers are a slightly different shape. Maybe it's an updated version?

I think I found the cassette player

Nah. The one in your link has round speaker grilles, while the one in OP's pic have different shaped speaker grilles. Also OP's one is missing the carry handle.

Does seem to be a similar model and likely related to it, but not quite the same.

If you really like this, it’s not that far off from how archeologists date stuff. Though they collect a lot more datapoints, have more context, and use more references.

R/chaeology

Beer can might also have a best before date stamped on the bottom

That tracks with my cassette player estimation: 2002. Presumably they didn't trash it while new, but it doesn't exactly scream quality, so it wouldn't surprise me if it died shortly after the warranty expired.

So if I were to guess: shortly after that bud light can was introduced, so 2005ish.

Questionable parenting with questionable taste in "beer"

Yeah, I was looking at that cassette player and thought 2002 or thereabouts

Two would be pushing it. The leaves would have matted more and built up in greater amounts. Put out last spring is my estimate: that's one year of detritus.

Assuming this isn't just two feet off the side of a trailhead or something.

That radio looks late 90s to me, possibly even early 2000s. Definitely not 80s.

I think its loony toons? tweety bird?

It's Tweety https://scontent-iad3-2.xx.fbcdn.net/v/t39.84726-6/654446445_1589516518970369_8484422416485531821_n.jpg?stp=dst-jpg_s960x960_tt6&_nc_cat=105&ccb=1-7&_nc_sid=92e707&_nc_ohc=HvKI8mJ011MQ7kNvwFgzqeP&_nc_oc=AdpcumPHZy2lHYbIzskH5FDG4Ar-4UAlWloHcuUCFADO4HZkIEoME3FLcGV-LKYvSFs&_nc_zt=14&_nc_ht=scontent-iad3-2.xx&_nc_gid=jIBvg7pJbo6u_xg-c6l9lQ&_nc_ss=7a389&oh=00_AfwY2hUEtVv4AF7vBL8eo4K4WZCDZODCqIZKOD_KnAi27g&oe=69CA81C1

I did solid waste dump responses when I worked for a health department.

When people who can't pay to dump have trash, they dump it in the woods, ravines, forestry roads, etc.

Usually the drive to dump trash is when someone dies and someone else is having to clear out their effects, be it family, a landlord, or some worker. Or someone is evicted from their home, vehicle, or encampment.

Otherwise most people hoard it until they die or are evicted.

There's an extra layer of mystery with it being in a wooded area with no path in or out

Depends on the parents

I should have mentioned that this is under a pretty thick canopy of leaves