I have shipped to the
boat care of the Marina. They are good with that though will naturally depend upon the specific marina.
Watch for duty, brokerage and VAT costs if
shipping from outside the EU. Things that seem a good deal change pretty quickly. (As an example,
engine parts from the US cost more in
shipping, duty, and VAT than the part itself!).
Inside the EU has been fine. Shipping from the UK middling, from North America expensive.
Flying in with an extra suitcase of
boat parts is often the best and very common.
Good luck!
P.S.
https://www.skroutz.gr/?lang=en is sort of a Greek eBay. I have heard good things about it.