John Sindt High D whistle, used, in excellent condition (brass w/slight patina, will brighten on request). $350, + $10 shipping to U.S. only.
https://forums.chiffandfipple.com/t/fs-john-sindt-brass-high-d-whistle-sold/92641/1
PM preferred.
Kevin Krell
It’s very nice of you to offer it here to us as opposed to putting it on ebay and getting what you can for it. Lately they’ve been selling for around $500 USD as I’m sure you are aware…$350 is still alot of money to put out for a whistle but given the current market, your offer is very fair and it is refreshing to see! 
luckily, I have all of John’s keys and am not looking myself but I’m sure whoever buys it will appreciate your fair price…good luck with the sale!
SOLD
I too wanted to thank you for offering your instrument on the Chiff UIE, rather than eThingy, Craigy, or otherwise.
Had I not already possessed a Sindt high D I would’ve been jumping early!
Niceeee!