I don't know how the GSP can be profitable. I sold some new diabetes monitoring kits on Ebay and a Japanese buyer bought them via GSP. They went through all the screening processes here in the? US, but when they hit customs in Japan they were a banned medical device. I got my money from the buyer, the buyer got refunded and I never got any negative feedback. The system does protect buyer and seller. I have shipped overseas for years without the GSP and never had a problem. It is a shame that rare and expensive test equipment might be destroyed. More likely it gets shipped back to US and sold surplus again.
RFI-EMI-GUY