Half-Blood Prince is a subtheme of Harry Potter that consists of 3 sets that ran from 2010 to 2020. Most sets were released in 2020 which accounted for 2 sets. As of today, the average annual growth of sets in Harry Potter Half-Blood Prince is approximately 6.0% per year.
Most valuable Harry Potter Half-Blood Prince set
4840 The Burrow $199.71
Largest Harry Potter Half-Blood Prince set
75980 Attack on The Burrow 1,047 pieces
Most owned Harry Potter Half-Blood Prince set
75969 Hogwarts Astronomy Tower
Harry Potter and the Half-Blood Prince is based on the 6th installment of the Harry Potter series. It was released in 2010 and only contained one set, The Burrow, home of the Weasleys.
3 sets

75980 Attack on The Burrow

Theme / Subtheme Harry Potter / Half-Blood Prince
Year 2020
Pieces / Minifigs 1,047 / 8
Availability Retired
75980 LEGO Harry Potter Half-Blood Prince Attack on The Burrow
Retail $99.99
Value $125.00
Growth  +25.0%
Annual growth 5.9%

75969 Hogwarts Astronomy Tower

Theme / Subtheme Harry Potter / Half-Blood Prince
Year 2020
Pieces / Minifigs 971 / 8
Availability Retired
75969 LEGO Harry Potter Half-Blood Prince Hogwarts Astronomy Tower
Retail $99.99
Value $90.79

4840 The Burrow

Theme / Subtheme Harry Potter / Half-Blood Prince
Year 2010
Pieces / Minifigs 568 / 6
Availability Retired
4840 LEGO Harry Potter Half-Blood Prince The Burrow
Retail $59.99
Value $199.71
Growth  +232.9%
Annual growth 6.2%