I got curious, so I went through the snakes currently listed on petfinder (www.petfinder.org). This may or may not accurately reflect overall trends in shelters and other rescues across the country -- dunno. It's just an interesting snapshot!
I did think it was interesting that there's as many albino burms listed as normals, but again I dunno if that means anything or not. Oh, and I didn't separate out the morphs of anything but the burms...and I didn't separate the rat or king species.
Ball python – 55
Bc – 27
King – 7
Corn – 24
Rat -- 7
Burm –
Albino – 3
Normal – 3
Retic -- 1
Borneo short tailed python – 1
Dumerils boa – 3
Carpet python – 1
African house snake – 1
Anaconda (no spp) – 1
trinket – 2
carpet python – 1
Kenyan sand boa – 4
Water snake – 1
Children’s python -- 1
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0.1 Peruvian rainbow boa (Amaru)
2.0 Brazilian rainbow boas (Arco, Olho)
0.3 Honduran milksnakes (Chicchan, Chanir, Hari)
1.0 Thayeri kingsnake (Coatl)
2.7 corns (Cetto, Tolosa, Uce, TBA)
1,000,000.1,000,000 other critters



So some people do have a skewed view of value.