PF, That is a good fair price, at least by my standards. What if he hits some unforeseen circumstance, is there an additional charge? The guarantee of no leak is probably worth an additional $1,000 or two! Out of all the quotes and people I talked to not a single one ever guaranteed a non-leaky pond and everyone made sure to mention they could NOT guarantee it. I would make sure to get in writing on the quote or some other signed document. I don't suppose you would be willing to offer up his name just in case I have future pond work?