Just a rant

Hi all
Just me blowing off some steam
I am restoring a 1972 Dodge Dart Demon, this is my first project in nearly 30 yrs
What my rant is
It seem every time I buy parts from ebay or swap meets the buyer claims that they will fit my car and every time the parts are Wrong
The most recent example was I bought a pair of new leaf springs at Moparfest and guess what they are 3 inches to short WTF does these venders at these swap meets have no morals or are they just out to fuk us.
Well thats my rant.
has anyone else had this happen to them
At this point I don,t feel like I can trust anyone or any US retailers
I BUY STUFF WHEN IT IS ON SALE so sometimes I do not use for 6 months or more.