My Little Pony: Friendship is Magic - Image #741,124

And now I'm thinking about this:

How this goes down:
1) Offer (say for example) "Scrapbanking: 17.33 available; LF: S.Black Box, S.Shotty"
2) Ctrl + C
3) Enter
4) Wait
5) Ctrl + V
6) Enter
7) Wait
8) Repeat from step 5

Just keep going at it until a trade request appears.

Pretty accurate, except no box spammers.