I'm pretty sure nobody questioned the legitimacy of the invoice. Just pointed out that the extent of the seller's knowledge of the build at Slee, was some paperwork. He never met that owner (per his statement, carfax etc.). The seller was also asked multiple times about lockers...did he ever answer? Questions about the motor work and head gasket? That really got him going.
This poor "newcomer" didn't contribute - not even a measley star, but merely joined to post his truck (flip or not). If the mods wanted it free of chatter and only from interested parties, they could have it that way. If you really read through all that and can say the seller was nothing but sweet, courteous and just trying to sell THE finest 80 to a smart buyer - I think you missed a whole lot of animosity from that gentlemen. A mud member was surprised about the location of a pic near a Veterans park he knows the area, seller gets butt-hurt and goes political (??), twice. Others (including yourself) point out his pricing. Again, he came back aggressively, not receptively. His entire tone went negative, quicklike . Id be careful who you label as saints and sinners around here.
You seem to be throwing a lot of stones in this glass house. You have 3 80's, are an expert and have hundreds posts (all contributory, none were after parts right?). You are right that not everyone has "two nickels" to rub together. Too bad they can't be banned from the classifieds. But what if maybe they saw one of your sweet rigs on the road, got that good old fashion feeling and said "I want one of those bad boys". In a perfect world, Joe "the one nickel" plumber finds Mud, does some reading, asks some questions and avoids some $35K CL trap. Maybe B&B helps find him a $700 cream puff.
That "mud = community = protection" door swings both ways man. All aboard for capitalism, just leave the hypocrisy back with your first post.