Some people appreciate the occasional for-sale notice...but I can see your point.
But I can certainly see your point. I mean Im not sure I would head for the exit after two such posts.. but excessive spamming of the journal area would get annoying.
I for one, found the PF70 Quarter post beneficial as I am currently working to complete my registry set.
There are, however, other venues which are more appropriate for selling and/or trading coins. http://tradingslabs.com for example, might be the better place for people who actually want to exchange items.
Perhaps these journal entries should be just that...journal entries about one's collection. That is what I have tried to do... with an occasional invite for others to take a look at my collection. http://cvcardsandcoins.com/coins.php (in progess). Stop by and let me know what you think by signing my questbook. It is always appreciated.