I wasn't sure what you meant when you said 'silver' Bi (was BCi) - I assume you mean an anery morph? Just be aware, any boa (Bi and Bc) will still yellow up with age, anerys normally do turn light tan, they don't stay silver/gray into adulthood.
Where are you seeing them so cheap? Possibly wholesalers or WC/farmed babies? just be careful of what source you use.
Surinams are normally more expensive ($300-800) because people want to be able to trace the lineage stock.
They are beautiful, that's for sure.
I do agree with the advise to get what you really want because in the long run you will probably be happier. I'm glad you are doing research ahead of time.
In the other thread where we were talking, you kept asking about adult cage size which was provided, normally a 4x2 (4x2x1, 4x2x18", 4x2x2) will suffice as an adult size cage. For an adult surinam female which can get up to 10' or so, a 6'x2' would be a better option (or 8x2 if you have the room and funds).









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