I have generally started staying away from damaged flans, at least those that weren't damaged in production. I'll make exceptions for rare coins or coins that are otherwise in sterling condition. I already had a complete Augustus/Agrippa Nemausus as, but I bought this cut one for Agrippa's excellently detailed rostral crown:
I'm glad the OP coin had a clean break, got repaired, and is being properly appreciated. At around 10% of the price of an undamaged piece, I think this one was a great value, considering its relative eye appeal.
Well, I bought this silver tetradrachm because I wanted to know - or document for myself what a coin is like on the inside.
The only broken coin I would buy would be a Matilda penny. Matilda was the disputed British would-be queen, whom the nobles would not accept as their leader after Henry I died. They chose Stepehen instead, and it resulted in years of civil war. A veteran dealer told me that he once had a Matilda penny that he sold 30 years ago. It was held together with glue, and I've since read about other ones that were held together with "museum glue." The dealer told me he still regrets selling it. During the period from William II (Rufus) to Henry II, alll of the pennies were terrible. I've read that England had a shortage of good silver. Here is my Henry I penny. After getting $1,000 + quotes for terrible coins, I bougth this ground salvage thing for a lot less. My view is if all of the coins you see are terrible, buy the cheapest terrible coin that is easly identifiable.
Here are two coins that fit my selection criteria as attractive and broken: I am in awe of @dougsmit's 3-dimensional tetradrachm photo above. Being able to see inside the coin is one reason I found it interesting. The second coin, with ragged edges, broken by years in the ground. I got this one for something <$1, but low price wasn't the draw.