$200-400 will get you awesome looking boas and since the OP is into balls it will seem like a steal.
I have never had a bitter, but my guess is keep handling her and don't put her on a routine, like feeding wise (let me word that better) feed on a regular basis yes, but dont put him/her on the couch every time before feeding, if you do then put him on the couch even when not feeding. They seem to be more calm when the can't expect anything.