Got tired of waiting around for a stud finder deal and noticed the old trusty magnetic one from CH Hanson was at a 1 year price low (based on CCC).
Never tried this, but people seem to swear by it (will try the string method mentioned in the comments).
https://www.amazon.com/gp/product/B000IKK0OI
Home Depot price-matched: https://www.homedepot.c