argo said:
I Like: changing the diplomacy mechanic to represent "propose a trade" as opposed to "make the other guy like me".
I Dislike: attempting to scale the challenge with HD
So how would you scale it?
Try this for a counter-example: I'm a first level comoner who, somehow, came into a lot of cash. I walk up to a 20th level fighter with a 10 Wis and say "mister, I have 2,315 GP. Will you sell me that +1 Longsword you've been keeping in your bag of holding since 6th level?"
So what is the DC for that? Well we "just met" so that is a +0, and 2,315 GP is an "even" trade for a +1 Longsword so that is a +0 which makes the DC = 15 + level + Wis mod = 35.
No deal.
Once again, you're using Diplomacy inappropriately. There's no need to make a deal here. You don't have to make a Diplomacy check to buy something at the store. This isn't even an eqaul trade, it's a good trade. The PC fighter could use the money for part of something better than a +1 sword. An equal trade should be more like "I'll lend you these troops to do this for you, if you perform this service for me" or "let me in; you might get fired, but I'll give you enough money to float you until you find a new job". (Of course, a threat of punishment by the evil boss, or a bad economy, can make the deal bad again.)
If a Diplomacy check would be made in such an example, it's only for haggling. Since neither the peasant nor the fighter seem interested in haggling, he can hand over the sword. (Assuming he's not suspicious of omniscient peasants who could be an assassin in disguise who will stab the fighter while he's going through his bag. But that's covered by Sense Motive.)
If the way Burlew wrote it bothers you (making it sound like you have to use it all the time, which isn't the impression I got), maybe you should think of it this way: Diplomacy checks should be made when adventure-relevant. Selling a sword is not adventure-relevant, and also there's no downside to it. Maybe the fighter would be suspicious, but that's covered under Sense Motive.
(And on the same note, there really doesn't need to be a DC/skill modifier for something ridiculous like trading a castle for a piece of string. So yeah, the house rule set isn't perfect.)
And the related issue: Rich's metadesign decision to make the mechanic work only "for those who put max ranks in the skill and have a decent Charisma bonus". Saying that that is how combat works doesn't make me feel better about that. The skill system is not combat, we don't scale Climb or Jump checks with level.
You scale a lot of skill checks with level. It's just not always direct. For instance, in the PH they have examples of "scaling" skill checks - tracking orcs that went by last week, and it snowed yesterday. The GM is supposed to present a greater challenge to higher level PCs. If the orcs passed by last week, and it snowed yesterday, in a 1st-level campaign, it seems to me the PCs have to use something other than Survival/Track to find the orcs, because passing the check is next to impossible. If, on the other hand, that happened in a high level campaign, using Survival/Track to find the orcs becomes a lot more reasonable.
Similarly, jumping from building onto a flying carpet going by is probably not easy for a 1st-level character (while jumping a ditch is so easy it won't necessarily challenge to a high level PC), and swimming an hour through storm-tossed water is probably going to be a serious challenge to a low-level PC ... even if those skill checks don't have a CR.
On the same hand, you don't talk a 20th-level warlord into not going to war at 1st-level ... or at least it's going to be really hard.
Skills are supposed to be something anybody can attempt. My first level comoner ought to be able to buy that +1 Longsword.
And he could. Assuming, of course, he somehow knew the longsword was there
