What to buy?

I am planning to go to the thrift store tomorrow. Reason for my little trip is that I just got fifty dollars I have decided to go on a search in the thrift store to look for blankets with classical prints or pretty summer colors (since I am more of a classic lolita). I have always had trouble buying things since my family is always on the border of lower middle class and poverty, so I have always been super careful about what I buy. So now I'm scared to buy anything.

Anyway, I was wondering what would be 5 basic colors/prints for classic lolitas? Of course theres white. I'm debating black since it's summer...

P.S if you have any advice on my indecisive problem, I'd really appreciate it ^.^