Just thought it'd be worth putting my hand up as a willing U.K. proxy. I have over a decade of experience of shipping vintage musical instruments worldwide, mainly drum kits! My crowning achievement was sending a 1920s orchestral xylophone to Australia. So I can package things well. I can provide proof of I.D. and point to my eBay account with 100 % positive feedback for extra piece of mind.
I just thought I'd throw my hat into the ring for anyone who isn't experienced with international shipping or someone wishing to build up and then ship a few keyboards at a time. Help my fellow keyboard enthusiasts out.
I'm offering this service basically for free; chuck me a Great British Pound so I can keep my parcel tape stocks topped up but that's it.
Just PM me with requests.