Well maybe not worth 300, BUT !!
I had the CoreRC Battery and motor case.
It held 6 batteries, x4 motors and a small parts box. Mint condition never used it.
I was sick of moving it around the room so stuck it on Ebay at 0.99p start. Like Peaky thought it would get around 10.00 if Lucky.
NO !!
38.00 POUND IT WENT FOR YES !! 38.00 plus postage.............
WASP I would of thought around the 50.00 mark......