Have you ever sold something used and the deal went bad?

To a friend or on Ebay.  You could be giving them a really good deal at the time, but either the item breaks like a week later, or you forgot to give them something as part of the original deal.  Then all of a sudden your the bad guy even though both parties knew the risk of selling and/or buying a used item?  I sold a Sega Saturn on Ebay and forgot to ship the RF switch so the guy wants a full $46 dollar refund even though its just a $2 item.  He's saying it was fraud and I did it on purpose.
 
Have you guys/girls had anything like this happen to you?  You were just trying to help someone out, but from their perspective your the criminal. 

Wow, that really sucks. Nothing like that has ever happened to me because I generally don't sell my stuff.

" Wow, that really sucks. 

I was selling some sugar to some Russians, only for the cops to come bursting out of the woodwork. My entire crew was killed and my hand was crippled. Deal went bad.... very bad.

haha yea it does, he opened up a "Case" with Ebay because I didn't respond to his message quick enough.  I don't think he understands that I'm not a business I'm just one person.  I have work 9-5 then hit the gym from 5-7.  I have a life, sorry I didn't respond in 2 hours.

Ummm, no quite the opposite. When I worked @ a Gamestop a few years back I used to get great deals.  People would steal stuff and then bring it in to trade or they would try and trade in import games that we couldn't take.  Examples: 
 
-Lady clearly stole a Ps3 eyetoy and tried to trade it in for cash.  At the time, GS only had the SKU for the PS2 camera used, which I informed her of.  She didn't care, which gave her like $2?  I bought the used "PS2 camera" for $4.99. 
-Guy brings in a boatload of his DS games for trade and has a copy of Jump Super Stars.  I inform him we can't trade it, but he doesn't care and says I can throw it away...fat chance. 
Claimed that baby as mine!

Can't you just send him the RF switch?

I guess it depends on the agreement you made with the guy who bought the item, as well as if you specified a money back guarantee if he was not satisfied. If you sold it "as is" and forgot to include the RF switch, I would think a quick apology and sending it ASAP would solve the problem. If he flew off the handle and filed a report to eBay, then they should just contact you about the situation. I believe eBay even states that it's usually a mistake on the seller's part and sending an email typically fixes the problem. I wouldn't really say this went horribly awry more than it was just a simple mistake. 

Its too late I already refunded the guy! Stop asking!
 
your making it Worseeeeeeee