you dont have to spend alot what i recommend is buying a fair amount of cards and then taking all those cards and trading them all for what you need. I traded 2 ex's (a sceptile ex delta, that i got for a hitmontop and a hitmonchan base, and a rayquaza ex that i got after i bought two boosters) and got essentially every trainer in my deck, and a few holons magnetons. Usually you'll get somethings people want, if you really want to make alot of good trades, save up and when power keepers comes out buy a box. Then trade with all the people that try to make complete sets, that try to get aton of the all holos and trade them all like a maniac. You can get a ton of stuff doing that.