No, Reagent Restocker is not necessarily what you are after
.
Plenty of different ones out there that allow you to set your own lists of what to sell.
Some other sell-to-vendor mods that allow you to make lists of things you want the mod to sell:
--my favorite:
DropTheCheapestThing (in addition to vendor selling, allows you to click-drop grays & things in your list out in the the field to save bag space).
--
Vendorizer (by Maul).
--the aforementioned VendorMaster (like Reagent Restocker, a "kitchen sink" mod that does more than just sell).
--
Broker Garbage.
--
SellJunk.
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Sell-O-Matic.
--the aforementioned Scrap.