24 HeartGold Collection cards with current prices, from most to least expensive; the most valuable raw card is Weezing Mirror Holofoil 036/070 ($143.63).
Weezing Mirror Holofoil 036/070$143.63
Donphan Mirror Holofoil 034 070$124.32
Ho Oh Legend 016 070$89.50
Ho Oh Legend 015 070$73.09
Blissey Mirror Holofoil 054 070$49.87PSA 10 $835.42
Ho Oh Legend Mirror Holofoil 015 070$49.72
Jumpluff Mirror Holofoil 008/070$49.72
Arcanine 014/070$32.82PSA 10 $344.49
Ampharos 034 070$29.83
Wobbuffet 041/070$26.36PSA 10 $309.46
Blissey 054 070$20.34
Slowbro Mirror Holofoil 018/070$19.89
Feraligatr 025 070$19.88
Flaaffy Mirror Holofoil 032/070$19.87
Cleffa 049/070$18.90
Cleffa Mirror Holofoil 049/070$18.90
Corsola Mirror Holofoil 027/070$16.91
Staryu Mirror Holofoil 019/070$16.81
Noctowl 059/070$14.92
Shuckle 011/070$14.70
Spinarak Mirror Holofoil 004/070$12.78
Professor Elms Training Method Mirror Holofoil 067/070$12.42
Clefable 051/070$12.22PSA 10 $202.31
Stantler Mirror Holofoil 062/070$11.93