I bought 39 packs of Pokemon cards over the weekend. The biggest purchase was 36 in a booster box, which cost £100. Please ignore the streaks on my windscreen, I used de-icer on it the morning I took this and it looks dreadful.
I also bought three loose packs for a tenner on Sunday, in which I pulled the ultimate Waifu card:
After that it made my total value of cards I pulled from the packs around £150 which means it was a good investment. I play the game competitively so got lots of useful stuff which I was looking for.