[thelist] reg expression question

[Michael Robertson]

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I've been trying to come up with an expression that seems easy but it's not working. I want to match an integer that is at least 3 digits long and MIGHT have a comma:

325
3459
3,459
10300
10,300

are all acceptable examples.

everytime i try to do something to match the comma it doesn't work. Any suggestions? Thanks
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