That sounds a little high to me. I don't have an e tech, but have had a few V Max and Mercs. My 300 hour on the VMax 4 stroke was $400 and some change. They ran and printed the diagnostics, services lower unit, change oil and filters, replaced water pump impeller, replace spark plugs and changed all fuel filters and some other random things. The e tech may be more, I'm not for sure, but it sounds high.