I've been collecting for a looking time. I use everywhere to buy stuff. EBay for rare/import stuff. But most of my collecting fun comes from scouring pawn shops. I get alot of fun/joy from finding great stuff for low low prices.
TBH..I deleted the game because it was so difficult for me. Aiming and being able to time your shots, is what it takes and I just don't have it or the patience to keep trying. I get frustrated with that stuff and I play for fun.
Sorry I couldn't be more help. Good Luck to you with it.