What are your Shipping and Handling Rates?
I offer rates at $2.25 for the first pound and .50 for each additional pound via media mail. This is much cheaper than I charged on ebay because of all the fees. This does include cost for postage, delivery confirmation, boxes/envelopes (many I use are new and cost more than what I count for).
Are the books coming from a smokers home or pet owners?
As these are second hand/used books, I have no way of really knowing. I quit smoking after a couple of years of smoking but never smoked in the house. We have a couple of house pets but they are not allowed in my book rooms. These rooms stay closed with the windows closed and shades covered to help keep the condition of the books the same as when I received them.