I say keep it simple (maybe price intervals without the high/medium/low-end categories works more easily) or, even better (and as others have suggested), do nothing.
In either case, I do think that saying "merch" in a pc is very confusing to others. Specifically, it can mean two very different things:
1) It can mean "This item is worth somewhere between 0-1k."
2) It can mean that the item isn't worth the time and effort to sell on the open market *to the person providing the PC*. When a person says "merch" in this sense, they're not talking about the value of the item. They're talking about the value of the value of the item to them. If an item is worth 10k but 10k isn't worth anything to a player, they'll suggest merching a 10k item -- often without acknowledging the fact that the item itself might be worth 10k. I think Burnsy has made this point already. In that sense, "merch" is an irresponsible and egocentric price check. It's not a statement about the value of the item...it's a statement about the value of the value of the item to a specific player. That is irresponsible, egocentric, and not helpful.
So, I think it would be a good idea if people stopped saying "merch" in their responses to PC threads...but legislating it away or re-vamping how PC threads work (instead, for example, just asking what someone means when they say "merch") seems kind of heavy-handed and unnecessary. Let's be big boys and girls.
