From looking at for sale ads on KS 2010 animals less than 400g are about

1.0 Ghost - $100-$200
0.1 Lesser - $400 - $450
0.1 Black pastel het ghost - have not seen one for sale but black pastel females for like $300 and female het ghost for around $100 so I am tagging it around $400

So somewhere between $900 - $1050 for 2010 animals.

I agree, I would love to get them from the same person!! It would make my qt much easier. What would be peak month to start seriously looking? August, September?