I am going to add my 2 cents.
If your interested in buying something, then PM the individual selling the item and offer them what you want to pay and then explain to them in the PM why you're offering a lower price - keep it off the forum. Then the seller can respond with the justification why he/she wants his price or make a price adjustment. As CoolCruiser suggested, if you can buy it cheaper some where else, then go ahead and buy it, but don't crap on the seller's sale.
If your not interested in buying the item, but want to make a suggestion on his/her selling price or method, then PM that person and state that you're not interested in buying, but here's a suggestion and state why.
Something like:
"Hey bro, I am not interested in buying your frame, but you may not know this, but you can buy a frame from soandso for $21 more than your asking price. I am not being critical of your price, but just offering a suggestion that might help you sell it quicker. Hope you the best in your sale. Look forward to your next build".
Or maybe, "Hey bro, I am not interested in buying your frame, but I know your frame is painted and that you had to make some mods to the frame and all, but your price is only $21 less than the price of a new frame at soandso. I don't know if you knew that or not. I'm just offering a suggestion that might help you sell your frame. Wish you all the luck with your sale. Look forward to seeing what you build next".
Again, keep your suggestion off the forum and don't crap on the guys sale.
To me, and it's just me, why should I have to spend my time on the forum defending my selling price. If you don't like it and your interested then make an offer via a PM. If you want to make a suggestion, then do it in a PM, not on the forum.
Another unofficial policy has been not to be critical or downer on a persons build - that is one of the reasons why some people quit going to the other forum.
Again, my 2 cents in this matter.
I look forward to seeing your future builds. Let's build and ride.
Chris
AKA: BigBlue