Anyone use a service like pandacourier.com or similar? We are looking to offload and send our climbing gear back home, before returning outselves. We'll be climbing in chamonix for a bit, and then traveling some more for non-climbing activities, and it'd be nice to not carry our gear the whole time.

A normal fedex shipment would be about $500-600 for 50-60 pounds of gear...

You might try DHL, however, the reality is that 50-60 pounds is not going to be cheap to ship reliably. In a similar situation a few years ago, I just stored my gear in a couple of large lockers at a central location then picked it up the day before my flight home. Hotels will usually offer a storage service or lockers at airports & train stations are other options. Enjoy your trip.

You're better off selling it locally than shipping it home. 2nd best is storing it near the airport, as mentioned above. There's no real economical way to ship it all home, especially not skis.