Sorry but I doubt begging for lowered declared value is going to go anywhere.
They could at least however put it at the correct price and make sure the documents are correct, I had some of mine marked as 500USD back when they cost 0,9BTC and BTC price was stuck in the 440 range. Then I've had one or two orders that were marked "computer game" instead of "computer game gateway" and I got slapped with customs fees in addition to VAT.
Actually the worst is when they describe it as "Bitcoin miner" UPS customs agents don't know what the hell to do with them.
I described exactly what they need to do and that is to use the correct import code for computer components/accessories or servers or whatever they want to call them that removes all question from both the import handler and the customs officers in the receiving country.