The Qianlong mark is nice but not of Imperial quality, and unfortunately not of the period. As a collector's advise I would suggest that this vase in my opinion is from the latter part of the 19th century even if it not possibly for me to be absolutely certain. The vase is still valuably but not the absurd amount of money it would have, had it been an Imperial Qianlong piece. I am looking forward to see more of your pieces if and when you find the time to send pictures of them. This information is given as an example of private conversation only and is not intended to be used as a promotion of any individual piece.
All opinions is the authors and is given as such with all hazards of judging anything from a photo.