None of these things sound related to a Marlin 336...Value and what you can sell it for can differ by quite alot
G43x (pre MOS ) $500
TLR-6 $100
Red extended controls $30 + $30 + 30
Red Tungsten Guide Rod $90
Ghost Connector $25
Wheaton Trigger $140
Ameriglo sights $80
Grip Tape $20
Kydex Holsters $30 + $30 + $30
3- extra Mags $75
~ $1,250 but because not MOS lucky to get $ 500