I run a classfieds website and I have complaints about users that want a reputation service for the buyers and the sellers. Anything I could do or opensource out there that would prevent fraud and maximise trust ? I was thinking something in PHP but perhaps someting else exists.
I was thinking of a system that users have some kind of a unique key for each users and it requires two keys and some kind of transaction agreement or proof. The system will then register most uniques reviews and simulate some kind of verified transactions. The classfieds itself show only listings and there is no transaction by me, but I could give some documents or the buyers/sellers could send me a proof or a verification token of some sorts.
What do you guys think ?