FYI All is supply and demand.

If you are in the States you should try to sell it on eBay.com or here on this platform.
The $ is very strong at the moment so buyers from outside the USA will have to spend more than they are used when buying in the States.

You can always first try the mentioned numbers (Pound is the same rate as the € at the moment) and launch an auction at $375, leaving you $300 if it gets sold.

My number of € 125 is the number I know I will get if I inform someone in Germany.

All depends if you have time or are in a hurry. Some collectors (me 2) have stock that's been in the basement for years on.

Hope this helps.

BTW: there are many Facebook pages also on the chipping subject

Jo from Belgium