Interesting thread. As a buyer who is relatively new to pinballs, I would expect honesty as been said by previous members. I think it is only fair to know what your buying. If in doubt about something, post it. If there is an option of after sales support even better, but thats what these forums and Nino are for:)
Overall I think the rule is fair, but I doubt it will change much, there are just some people you can not please. years of being in retail and wholesale has proven that to me. I would like to believe that regardless of negative posts people should be smart enough to read between the lines and decipher through the crap. In the end, if a seller is honest and sticks to his word he will have some longevity in his chosen industry AKA Mark. (Now that I have praised you Mark, I expect a better deal on my next machine) :)