if i give a xbox one with 3 games toward a ps4 how much money would i have to bring

More likely $150 /$200 bucks

Call the store.

you definitely have to call the store for that info, they go by the condition of everything you are trading in, they make sure everything works, and if you have any games they have to scan them to get a price for store credit (which is always a bit more than getting cash, that goes for everything you take there, store credit is more than getting actual cash) it also depends on how many GBs the PS3 is etc. But no one can give you even a round about price amount of how much you'll need, except the store employees!

You should call the store

See your gs rep Jay..they'll help sug

Sorry you'll need to contact the store for that information!