@Melanie Stephens Here’s one of many for me:
Back in April of 2019, I was looking at houses that I could potentially buy for the BRRRR method.  I came across a two bedroom house with a garage that was selling for $40,000. It was a foreclosure. My niche at the time was only townhomes. I went to see the property and saw that he needed a moderate rehab of $25,000. I've done this type of rehab before and was certain about my numbers. There were no two bedroom houses selling in that area and so I did not know how to properly evaluate the ARV of the property. I compared it to the townhomes that I normally invested in and estimated that it would be worth no more than $80,000-$100,000. This was a mistake on my part. I passed on the deal because it was not going to be a perfect BRRRR. A member of the same Facebook group I was in went on to buy that property. He sold it six months later and made a $65,000 profit because the ARV of that property was at least $130,000. This was an important lesson about making sure that I get the ARV right and I'm not comparing apples to oranges.