Buying a 360 engine, need advice

Not sure if this is the right place to put this.
Came across a 360 block on CL, asking $100 or best offer. He said it has the crank, pistons, and rods still in it. Said it came out of a 98.
Supposed to send me pics of it, along with the numbers, and the title of the truck it came out of tomorrow.

What do I need to look for? Don't have much experience with engines, so I'm clueless.
Should I just pull the trigger on it and buy it?
Thanks for the help.