I can't offer up any advice about whether or not this kitten is purebred. I don't know enough about breeding/genetics to throw out theories about the father.... but I will say this:
Whether or not OP buys this kitten - no matter what, it needs a home. If OP doesn't buy it, some one else will. OP (amstar2123) has said no matter what, she loves the kitty and wants to provide it a good home. In my very humble opinion $600 is well worth the vaccines, vet examination, and the one year guarantee on kitty's health.
How far away is the breeder from you amstar2123? Any chance you can have a visit to see mama, kittens, and hopefully daddy before you make the purchase final? That might help alleviate some of your concerns.
Whether or not OP buys this kitten - no matter what, it needs a home. If OP doesn't buy it, some one else will. OP (amstar2123) has said no matter what, she loves the kitty and wants to provide it a good home. In my very humble opinion $600 is well worth the vaccines, vet examination, and the one year guarantee on kitty's health.
How far away is the breeder from you amstar2123? Any chance you can have a visit to see mama, kittens, and hopefully daddy before you make the purchase final? That might help alleviate some of your concerns.
mom stopped nursing and our kitten wouldn't eat on its own . Breeder says she tried bottle feeding for a week but still lost her. I couldn't bare to tell my kids their 1st pet died before even meeting it so we found one 20 minutes from home 9wks old and ready for furrever home 
this kitten is gorgeous!! Came right in and made herself at home! No hiding or being timid. Played with an 8 yr old, 2 yr old, and 18 mo old. Let them pick her up and everything! Ate, drank, and used litter box! On the way home with her I get a text from the original breeder telling me she messed up and our kitten was in fact alive and eating well...she got her clients mixed up!! Wow!! God works in great ways! Looking back at the pics I think we were originally buying from a kitty mill. Adults look unsocialized and pissed off. And nursery is just an empty litterbox. When we picked up our little girl, mom was wonderful! Came right up to us and didn't seem nervous at all about us being around her baby. These cats were socialized and well taken care of! So glad everything worked out for the best! And this one actually comes with papers. Original said she didn't have breeding rights on dad which I found suspicious. I just hope our original kitten finds a great home! Here are some pics of our little girl we got today!
