Thanks - but as a reference guide, do you really think the first edition of this, will become more valuable than the 3rd edition? I think these type of books while available, over the medium term (at least for the next 15 years), will not be worth more than cover price, with earlier out-dated issues being less valuable than more recent issues.
But I still think I agree with you - sell the first now, and keep the 3rd.
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