What are the items you’ve purchased that now have the lowest per-use cost

When I buy things, I always think about how many times I need to use them to bring the per-use cost down to a reasonable amount. For example, the daily use cost of my $40k car was $109 at the end of the first year, but after 10 years of ownership, it’s down to just $11 per day.

This mindset has helped me avoid impulse purchases, like an expensive bicycle I wouldn’t use often enough to justify the cost. If I were to buy one for $7000 (electric Specialized Creo 2, non essential, hobby item), the first ride would cost $7000, the second ride $3500, and so on. I love cycling, but thinking about it this way, it’s exhausting to imagine how many times I’d have to force myself to ride just to avoid feeling guilty about the purchase.

Looking back on the things I’ve bought, here are a few that have truly paid off:

Express waist belt: $50, 18 years. 0.7 cents

Ray-Ban sunglasses (replying to comments, this was with prescription and i was ripped off at LensCrafters): $500, 13 years, 10cents

And they are still in great shape, not worn out.

What are the items you’ve purchased that now have the lowest per-use cost