Advice on buying junkyard engines?

All 3 cars were parts cars. If you catch a vehicle before they transfer the title, you can buy it and get the original title transferred. My yard has cars parked outside the yard for sale. In Wisconsin if a vehicle comes in without a title it has to sit out of the yard like in the customer parking lot where it can be seen for 10 days before they can apply for a salvage license. There are ways to get titles, although I don’t know how easy that is. It all depends on what your relationship with the yard owner is. Mom and pop places like mine are easy to establish a relationship with. Like I posted, I’m there often. Be aware they are reluctant to do business with someone that buys and bitches and tarnish their reputation. They know plenty of standup scroungers and don’t need the hassle of crybabies. Most parts I bought have a 10 day warranty, batteries are 30 days and $25 a pop. They tell me before if something is as is. If I say I don’t know if it will fit or bring it back cause it doesn’t, they say ok. The 3 cars I bought, I knew what I was getting into and I have tripled my investment selling parts here on FABO.
To be honest, I haven't been to a junk yard in many years. There used to be one that was pay and pull but I don't know if they are even around anymore.