21 Mysterious Mountains cards with current prices, from most to least expensive; the most valuable raw card is Magneton 038 088 ($201.01).
Magneton 038 088$201.01PSA 10 $12,234.56
Nidoqueen 010 088$201.01
Magneton 072 088$125.64
Houndoom 069 088$115.58
Xatu 047 088$112.07
Arcanine 016 088$90.45
Steelix 074 088$50.26
Beedrill 004 088$40.20
Magcargo 056 088$40.20
Diglett 048/088$30.15PSA 10 $463.10
Ursaring 067/088$30.15PSA 10 $251.27
Growlithe 015/088$25.12PSA 10 $201.45
Swinub 057 088$25.12
Dewgong 024 088$20.10
Dugtrio 049/088$20.10PSA 10 $371.89
Houndour 021/088$20.10PSA 10 $190.94
Nidoran F 007 088$14.57
Venomoth 012/088$12.40PSA 10 $180.92
Fast Ball 075/088$9.04
Bounce Energy 087/088$7.54PSA 10 $226.92
Lure Ball 077/088$5.02PSA 10 $167.56