You might want to call it something other than a garage/yard/rummage sale.
Perhaps a "Quilter's Moving Sale"? Than with an idea of what you have available and ranges of prices that you are asking:
Yard goods: $2 to $4 per yard
Books and Patterns: $2 to $5
You might add that there will be 'other items' for sale at 'priced to move' prices.
I really don't know what's 'fair' to ask -
You might base your prices on:
1) what you paid for the item
2) what you think the market might bear
3) how attached you are to whatever