I am looking for an Audio Cd or collections of CD's which teach
English to a Spanish speaker. Ideally , something with a proven track
record and not too expensive. Perhaps a list of a few options.

Hi, and thanks for the question

The Pimsleur Approach has many glowing recommendations from
publications like "The Boston Herald" and "Los Angeles Times"
http://www.pimsleurapproach.com/learn-english-sp.asp?sm=78

The starter course CD ( or cassette) sells for $19.95 with worldwide
shipping an extra $4.95

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The Vocabulearn site has won several awards, and sells a stepped
series of Spanish to English CDs at $19.96 each
http://www.pentonoverseas.com/vocabulearn-cd.htm

   ..o0o..

English for the Real World for Spanish Speakers comes as 6 cassettes for $29.95
http://www.languagequest.com/home/product.php?prodCode=EFRWSS&lang=English

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The Broderbund product is a mixture of PC based and Audio learning for $39.99
http://www.broderbund.com/product.asp?OID=4154422

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There is a whole set of different opitions, from video courses, audio
courses to CD-ROM learning materials detailed at
http://www.101language.com/spanish.html
Some of these are pretty pricey, but you might find something useful here.

Hope that answers your question

willie-ga

Search used 
Spanish "learn English" audio CD

Rosetta Stone is not an Audio CD but as a CD-ROM it's very usefull for
home learners.