250-500cc What would these parts sell for?

All these are for a 09 wr300. I got a basically brand new stock gas tank, stock muffler and stock headlight assembly. I got to talking to this guy that bought a used wr and told him i have these parts jokingly if he wants to but them. He turned around and asked me a price. I realized i have no clue what i should get for them. Ideas?

pretty good starting points for brand new (not used) stock parts for me has akways been 1/2 retail of the part or a similiar aftermarket item. Not science ...more art because sometime inferior stocker is more money than aftermarket but 1/2 price of brand new is good starting point.

$125

Tree fiddy

Actually, like Joe, I use the 50% rule.

For all three?