I don't want to be over-leveled in my 1st playthrough, so instead of leveling up I want to stock up with different items so later in NG+ I can sell them and get a bunch of lvls quickly.
For now I'm buying Smithing Stones 1 and 2 from the vendor in Roundtable hold. They cost 200 and 400 runes, and could be sold for 100 and 200 runes. Which is effectively 50% of rune value saved.
Are there any items with more than 50% resale value available from vendors? And at what point in the game they become available?