crudepricing.com - definitely the stronger domain here. i would place a call to a broker and see how they advertise stocks regarding oil, fuel, drilling, etc. This should give you an approximate idea where you need to position this domain. there is no doubt in my mind that this page COULD be used as a resource guide and price review/stock ticker guide, specifically tailored for oil. Also, i think the most important ingredient in positioning this domain would be to get an RSS feed relating to the OPEC.
the domain itself, without content - low $xxx
but not developing this one would be the wrong decision in my eyes.
and gulfcrude.com,...well,...ummm.....No potential as a stand alone domain i believe, BUT, who said you couldn't affiliate the gulfcrude with the crudepricing and run a seperate oil forum or something of the likes, or affiliate with the oil rig job sites, etc.... other than that, reg. fee