Hi Guys, I am looking for an advice. I have this Paul Picot, Chrono GMT on a Valjoux modified movement.

Where would you go to trade a minor brand like this? Considering that I am not looking to sell it, but to have a Longines Zulu Time in exchange (adding money if needed of course). Chronext sells this brand, but apparently they don’t buy it (How odd!) and local watch dealers only offered me consignment.

Any other idea?