Hi Tony,
I think it's wonderful you're writing and selling at 71. I sure hope I remain that ambitious and creative. I'm only 55.
Got some suggestions that might help.
Auctiva wouldn't host or deliver your eBook. Essentially, Auctiva just helps build your listing and host pictures for your listing. They don't currently store eBook or other downloadable materials. That delivery could be done in one of several ways, but the easyist method would be to eMail the book to the buyer after payment. A 45 page book should be small enough in size (bytes or characters) to make that do-able to even low-speed internet users. Here's an Ad on eBay suggesting that delivery method.
http://cgi.ebay.com/57-Ghost-Stories-Supernatural-Tales....l1247QQcmdZViewItemSince the book is in WordPad (Microsoft), that could represent some problems for a recipient that doesn't use Windows, like an Apple MAC user. Not a big MAC user, so don't know if they can handle WordPad document for viewing. Note, the seller on the Ad uses .PDF format and the Acrobat Reader. Acrobat and .PDF format is generally universal. The Acrobat Reader is free, but you'd need an Editor or translation software to change your text from WordPad format to .PDF format.
Also, ebaY has some restrictions in policy you might want to review for selling eBooks.
http://pages.ebay.com/help/policies/downloadable.htmlHope that helps and makes sense. Please fire-back any questions and I'm sure that I or someone can help with any details or howto on any specific items.
Auctiva has a good Tutorial you can use to help get you started with listing.
Dan
