I personally don't think it's worth it. But then I think most things are overpriced these days which is why I tend to stay away from the player vendor market. I did buy a Pendant of the Magi & basic Scrappers for my mage, at 425k & 195k because I really wanted them. But I was even choking at those prices hehe. Usually, if I can't make or loot it myself, I tend to go without
Perhaps it's different for guilds with shared resources, etc, but I've never been guilded, so don't know how that would go.
But the problem doesn't stop at scrappers unfortunately. Pretty much all the ingredients from ML have the same problem... hugely expensive and cost more to make than the finished product is worth. So unless you find the resources yourself, forget it. I think the economy in UO is a bit messed up tbh. Peeps put too high a price on time invested in gathering the resources. Heck, even the most recent "chocolatier" addition is the same... at current prices it would cost like 100k to make one chocolate!