Posting interest for an item in an ad thread first new rule???

That is one opinion.
Mine is.....The first to make contact should be the first one to consider.
Picking favorites to sell to seems petty and rude.
UNLESS the first to contact the seller has been a problem to the seller or others.

and I fully respect your opinion and that is totally fine for you to do. I just don't think it is my place to tell you who you should sell your parts to. IMO, you are free to sell to whomever you wish.