Appreciate your input. I can imagine the marketplace being a headache to maintain when it comes to scammers, downvotes and whatnot. I believe we discussed this in a different topic a while ago also. I imagine it's important for a solution to not only be reliable but also ideally be low maintenance and not too difficult to implement. Would probably have to deal with some sort of legacy feedback system to preserve current user ratings however, which doesn't make it any easier.
Maybe there are better solutions today, like embedding some type of escrow service. Will look into this and open to ideas.
I know of a national (Dutch) marketplace platform that embeds an escrow service and unfortunately this seems to be even worse than using Paypal with purchase protection. You tend to run into the same issues but with higher fees and at a larger scale. What happens a lot is that buyers claim that they received a brick or some other worthless item instead of what they purchased. You can however often not dispute any claims as a seller because the escrow service practically always favors the buyer without any meaningful proof or any investigation. It's just easy money for the escrow service without providing any real value. The worst part is that the escrow service is entirely independent from the platform that hires them. They make their own decisions and disregard any proof provided by the marketplace staff that could prove a seller to be legitimate and honest.
There might be more reliable and better curated escrow services out there, but my assumption is that their fees might not make it worth using their services.
The voting system, the other headache: it is far from perfect but better than nothing. And also as a seller you can look at the votes. Which, I am aware, give you another illusion of security :(
I agree. It's a start and while it's not flawless, it's much better than not having any system in place.
What I think could be of value is to require both parties to identify whether they bought or sold an item from/to the other user, along with a textbox where they can write their experience. You could then further expand this by having a separate rating for purchases and sales for each user.
A way to verify a transaction would be ideal, but I think that this could take a significant amount of work and probably also be costly.
I'll explore some ideas today and post here if I feel like I have something worth considering.