Worth a shot, but generally speaking, trying to sell the hyphenated version of a multi-keyword .com name to the unhyphenated owner is like trying to sell SameKeywords.LesserTLD to the .com owner. 99 times in 100, you get ignored or snarked at, and for good reason.
The funny thing here is that the .com owner is getting his ass kicked in search engines by the .net and .us, so he might comprehend the value of 'exact match' and if you hint that you're considering becoming a keyword competitor, it might inspire him to come off a little cash.