WHAT IF the situation becomes like this, the other party send the bitcoins to the multi sig address, you send the paypal and after xx amount of time you do chargeback and refuse to sign the transaction for the other party to get his bitcoins back?
Yes, that's the risk on a 2/2 multisig deal. My idea first idea was that the other party has to take the risk and compensate with an appropriate commission. Also I offer to start with low value deals, so that it might not hurt too much if I really would be such a troll. However I suggested to do a 2/3 multisig deal with an independent third signer. I'm asking here for such a signer:
https://bitcointalk.org/index.php?topic=3648604Now with a third signer, he can step in that case and sign the transaction with the other party. The only risk left, is that I and that third person are conspiring. But I hope to find somebody who has enough reputation. I could also offer to go for a 2/4 multisig, so that every party offers an independent third and fourth signer, but I think this makes it needless complicated. But I'm totally open for any suggestions.