I tend to spend a lot of my spare time checking out our local on-line buying site, Gumtree, just to see what's out there.
I am regularly amazed at the lack of research/knowledge of so many people that have obviously kept fish for some time and have decided to sell on their fish.
I see people regularly mis-identifying or naming pretty common species in spite of all the information available these days on-line and on excellent forums such as this one.
As a prime example: An advertiser yesterday was selling off her fish that she had owned for sometime as she was closing down her tank. One group she was advertising as 6 large Bristlenose catfish, she wanted $15.00 each (not unreasonably priced), except the pictures that she provided with the ad were of large Feather Finned catfish!
I sent her friendly e-mail to let her know that she had mis-identified her fish, and that she may want to re-advertise them correctly as Feather Finned Catfish, as she would get a far better price for them, and wished her the best of luck.
I received no reply, but the following day I noticed she had re-advertised and was now asking between $50-$70 per fish (again not unreasonably priced).
So from potentially earning about 90 bucks she was now in with a chance of getting over 300!!
Feeling a little put out that she hadn't bothered to acknowledge my assistance, I sent her a quick e-mail with the simple message "Your Welcome".(Probably a little churlish of me!!)
Perhaps I should have just bought them for 90 and sold them for 300 myself Lol!!