I have a Cateye Cordless 7 that I just took off my wife's bike (I got her a CDW3000). I put new batteries in it within the last couple of months and it is still in good working order. If you're willing to pay the shipping, it's yours...I doubt it would be more than a few bucks.
Performance is currently selling these for $36.97 (regular price $54.99).
Send me a PM if you're interested...this isn't necessarily first come, first served...I'd like to send it to someone who has been active in this group.