A piece of used electronic test equipment (model 495) was purchased on flea-bag for $900 +120 shipping. (this is for my job, and I opted to pay for it and see if I can get reimbursed. Large risk)
Guy from flea-bag called me and said it was too bad to be sold, that the display was broken, and he would refund all my money (good thing!).
He then haggled with me on the phone, and said he may have other things to sell me. He then produced an item for 10X more cost!
I said no and good bye(of course!)
He them emailed back and offered an "as-is" unit. He said it was a certain model number...492, which would be good since it has parts to fix my unit at home that went bad.
He shipped it for the cost of shipping at $75 (it is heavy). He got junk out of his stock.
I waited for a week to get it. I missed FedEx 3 times because they would not ring door bell nor knock on door.
I was coming home from gas station to see FedEx driving away and another tag on my door. The final tag.
I then parked the car, it idling. ran after FedEx truck yelling "stop I'm here, I'm Here!!!!"
The man stopped in the road, I signed for the 50lb package and carried it home!
I unpacked the item, it was the wrong item (a model 495) he said it was a 492 model! He sold me the broken as-is unit he said he would not sell! Ahh!
I powered it on, and it was broken! Useless.
I started to think about how these things work and used logic.
I took it apart, and found a cable was essentially swinging in the breeze, tightened its contacts, and plugged it back in.
Unit works like a dream!!! Has been working for days now!
HAHA JOKES ON HIM!

Rule #1 of test instrument repair, visual inspection, tighten cables, clean contacts, jiggle things with plastic rod when powered on.
Rule #2, repeat #1 with good lighting!
I got a good instrument for my job, listed at $900 for $75.
I do not think I will tell him what happened.
But wait there is more!
I then proceeded to swap a part from the NEW unit i just got, with my old one, despite being a different model, and voila, it is fixed! ( I suspected what was wrong with the old 492 model) So I know what part in my old one is dead! And even better news is that part is also available on flea-bag for only $30...free shipping.
I will soon have 2 great pieces of test gear for a whopping $105, not bad when you consider my model 492 still sells for $1500 and my "new" model 495 sells for $900 today. $2400 of stuff for $105? yes please! Can we say re-sale? At these low prices, I do not need work to reimburse me.
I wonder if I can make this a side hustle?