I still have a box of my matchbox cars from when I was a kid. They’re not in the greatest shape, but I wouldn’t get rid of them.
I gave almost all of mine away. Then I got married, had a kid and regret it every day.
I had maybe thirty cars, a mix of Matchbox and Hot Wheels, plus an orange gravity track with a loop, and a little Matchbox service station. Most were realistic models: a BMC Pininfarina, two Porsches, a VW Bug police car (?!), an AMC Javelin, a Ford Cortina, three RR Silver Shadows, a pink Lamborghini; but I did have a few weird ones like the Hot Wheels Big Banger. Oh, I also had two Corgi Jaguar type E V-12s.
My friend and I would make up whole episodes of complicated spy stories, typically involving flying cars (because flying was way cooler than wheeling them across the carpet) equipped with various types of weapons (think those are mere headlights and tailpipes, do ya?). The local TV station had a daily rotation of Supermarionation shows we used for inspiration. 
Somehow, I had also ended up with a Matchbox full-colour catalog, showing all the cars I would never have.
The whole thing gathered dust and mold in my parents’ basement for decades. When my nephews (the only kids in the family) showed no interest, we threw them away. :smack:
I used the vice on Dad’s workbench as a crusher for ones I didn’t like. Some off-brand semi tractors that didn’t fit the scale of Matchbox/Hot Wheels.