A complete answer to any two of the following question will be
considered complete answer.

1. How is volume of book sales related to price of  the same  book
used about five years later? Bestsellers are horrible to sell later
because there is such a flood of copies available.

2. How old must a used book be before it starts to gain value
simply from being old?

3. What is the best way to sell books online?

4. Is there an online business game/simulation that is easy to play?

5. Where can I find very very cheap dry storage for boxes of books?

6. Is there an online site that allows a dutch style auction?
also called "Mineing" ?

7. What other sites swap books or music?  I know of titletrader.com,
paperbackswap.com, frugalreader.com.

8. Does anyone sell used envelops suitable for shipping books?
Clasp, padded, small boxes for paperbcks and hardbacks.

9. What type of browser or software would allow the automation of ?:

A: Searching for used book titles worth a minimum of 6 dollars on
Half.com, or Amazon.com or bookfinder.com or isbn.nu

B: Listing used book titles on Half.com, or Amazon.com.
Ideally from a list of  ISBN numbers.

10. Is there a way to check that a book on tape or cd  is complete and
in good condition without actually listening to the entire tape or cd?
 Prefer a method that does not require a master recording.

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Clarification of Question by redfoxjumps-ga on 03 May 2006 12:24 PDT

A complete answer to any two of the following questions will be
considered complete answer.

You have asked 10 questions, some of them quite complex, and offered
less than $4 as payment.  Some of your questions are difficult to give
a short answer too, and others may depend on your location (esp. #5). 
You may want to read over google's pricing guidelines and perhaps
repost some of your questions separately at a higher price.