2/3 of an easy selling price is the best you can expect. GG are no different from most retailers in this respect. They don’t see that they’re making a profit on the instrument that you buy, they want it on everything. It’s their business and that’s the way it is, plus they have 20% VAT to consider and probably free delivery, if ordered online. Commission sales are the way to go IMO if you can’t move it here or elsewhere.