Is scamming a problem on rocket league at all? I've never traded before, so I was just wondering if there is ever a situation where items/keys/crates can "poof" like in Diablo 2 lol... or maybe trades get reversed for some reason (in which case someone got scammed out of fg)

Do trades go through immediately? Or is there a waiting period for the items to transfer?

Can you trade those "showroom" cars? Like the batmobile or delorean cars?

Is there a source that keeps track of items and their values?

Is there a site that already explains all of this? lol

items wont poof, but there are scammers aroudn who for example switches items out (i got scammed 45 keys once for not checking white dracos again - he wswitched with grey ones)

trades go imemdiately, but if u got an items from a crate theres a 7dcooldown

rl- tracker or sth like that keeps good track of prices

The 7 day cooldown is on keys after you bought them from psyonix, not on crates. Then if you open any crate with that key, the item will have the remaining cooldown of that key.