As long as the stuff being sold has an accurate description I don't see a problem with this.
I realize the new guys are most at risk here because they aren't as familiar with the gear as the old but surely 20 posts more or less isn't going to make them a genius either.
We all know who sells the good stuff and that wont stop anytime soon, maybe a better rating system can be put in place so the newbies can identify more of a sure thing rather than taking risks with unknown sellers. The old guys however wont have a problem and might just pull the trigger on good restore opportunities as they fix and hone their own stuff. More stuff can be more fun. Worth a try what can happen? You can always change the rules back if its a disaster but i don't think it will be.