Affiliate Marketing Secrets

I have a little over 5,000 items active on eBay and would like to download/export the listings in a way that would make it easier to populate my own online store. All of my items are “Buy Now”. I will be keeping my eBay store while having my own store to get the best coverage for my niche in the search engines. My store, however, will not be designed to link back to my eBay listings. I would rather it be a stand alone store. Thank you in advance for any assistance.

I’ve got a ton of low/niche demand items like old books,cheapo gadgets/electro, clothing, that I get for almost nothing and mostly leave to auction with shipping padded to cover minimum acceptance rather than pay jacked up inserts and reserves (buggers get enough $ as is)
Anyways if I ever wanted to have a sale like buy one choose any other auction free for me to take down and ship with your purchase (for old stuff that isn’t moving) how could I go about putting my paragraph at the top of my description for all of my listings?
Manual simply is not an option for this. Free programs/sites like auctiva used to be preferred but would pay if I had to for the ability to on/off en masse. Over 2200 listings any given time that are real profitable -but move slow as crap.
And please don’t say buy it now or anything stupid like that. Inserts x thousands add up. Not to mention on old books and crap auction is vital for not knowing its worth. Some of the crap in the dime a pound pickings you get randomly carries 40 or 50 dollar demands…weird and impossible to expect in larger volumes.