(I had to make said post in a hurry and had no time to re-read it properly after writing, so certain statements can be misinterpreted, like Kerol did --sorry)
Ok, forgiven and forgotten
About RP in /auction:
You need to think the other way round. Why is there so little spam in the /auction channel? Why is there no RP in that channel?
1. The repetition-spam prevention of DaveG does a good job in general.
2. We GMs are very strict on spamming, plus that is supported by the majority of the players.
3. There is about no RP in that channel because the few times people tried it, it was frowned upon because of "blocking" the channel while the RP was running.
The "spam" we have in the auctions channel is nothing, really nothing compared to big MMO's, so why move auctions of their intended channel?
I know exactly what you mean and I also can give you the answer on that.
You need to differenciate between auction-spamming and RP auctioning.
Take a look at the auction chat of the "big MMO's" you compare it with. You see messages like "SELLING 10/99 BS FOR 100k! /tell Kerol!!!" all over the place, again and again.
It is more like a notice board where everyone "pins" his/her offers for everyone to see. You pick out the offer you like and /tell the guy. Everything further is usually done in a private chat or with very simple language in the auction chat.
In an RP auction, you don't simply put your items for sale, you also show your emotions, describe actions like "/me jumps on the stool and yells the next offer" and so forth.
You have a lot of "unnecessary" text in RP auctions, flooding the chat, thus blocking it for more "notice board - auctions".
Now we have the "notice board - auctions" in /auction (which is OOC, to 90%) but the /telling as mentioned above in "everything further is usually done in a private chat.." is done or should be done in /say instead.
I myself find that solution a pretty poor compromise, but it satisfies most needs.
My favourite auctioning system would only require a /shout with either flexible ranges like I proposed and/or having walls blocking the shout, as DaveG stated while having the auction in buildings. PLUS having a notice board at a central place where everyone actually could pin their offers and needs on.
A notice board would make the "notice board - auctions" redundant while the /shouting with very limitted range would simplify the systems while minimising the disturbing effects.