Was it a stone you didn't buy, a razor you dropped, or maybe a product you wish you didn't get.

My regret was spending 100$ on a razor strop set when I decided to start straight razor shaving. Later I found this forum when I was having trouble with razor and figured out it was a low quality razor. Rest of the trip has been smooth except for maybe for a few nice deals I passed up.

What regrets do some of you guys have?