I've been in many thrift stores before, but I never purchased the clothes by pound.
There was no fear to overspend the money because I had to fly home in two hours so I couldn't buy much. Besides, the store was about to close. I had only 35 minutes to dig in the bins.
However, I was happy with my purchases. Besides 10 scarves, I was especially happy with Dolce &Gabbana jean and a summer cotton/lace dress. I spend only $3.52 for 12(!) items of clothes.
I feel like that sometimes shopping in the thrift stores can be more cost effective compare to the mall shopping.
