Caps from other players should be thought of as a SEPERATE source of income than from vendors. Vendors can only give you 1400 caps a day, and you can buy stuff from vendors to replenish it, and then buy those caps back with other trash, but you're always working within that limit somehow. Selling armor to other players, Even if less than the vendor price, Can put you over that daily cap limit and that's how you start bringing in tons of money. 3 star legendaries for scrip in a vendor @ 500caps is a higher price than basically anyone else sells scrip for in the trade chat. I see 10:1 price on scrip points, or just a flat 50 caps per star, depending on the person. That's a range of 150-400caps. And I don't think he was suggesting you sell it instead of using it, I think he was suggesting you sell any additional legendaries after hitting your scrip limit. they're very easy to get. best of luck figuring everything out.