That's a somewhat oddball inventory. Some decent stuff in there, but opened glue? Plectrums?
It kinda depends on how you want to sell it.. garage sale? Ebay/craigslist?
If you sell the soldering iron together with the solder & flux, you could get about 10-15 bucks for it. Depends on brand and condition I guess.
The tuner & metronome, I guess about 5 bucks each if your lucky.
The hardware, like the chinese strat set, humbuckers (generic brand?) and the locking tuners.. you could sell together too. If the humbuckers are any good, I think you can get about 15-20 for that. If the humbuckers are any good, you could go for much more but cheap generico second hand hb's... well, not much.
The instrument cables might go easily, but price depends on brand & length.
Guitarbuilding supplies like the fretwire, neckplates, inlays, shielding tape, etc. It kinda depends on how much of the material you have, I dont think anybody would buy stuff like that unless it's a really good deal. Or sell it toghether with the luthery tools.
If you sell the whole lot in one, I agree with soapbar. About 200 bucks seems right. It's not so much a question of how much it's worth but rather that a lot of that stuff isnt realy stuff people go looking for when browsing second hand.
But I wish you good luck nonetheless. I hope your not having financial troubles.