Hey fancy, what does an 8-10 week old silkie go for? Thinking at that age you couldn't be sure it's not a rooster either though she is saying hens. Lady selling them for $50 each on our local Facebook buy and sell. Kinda thought yikes! Not show quality or anything but she is getting a fair response to the add.
At 8-10 weeks it would be an educated guess. If they aren't show quality I wouldn't pay anymore than $30 and they'd have to be pretty at that.