I have a burley delite that I only use as a trailer. I've seen others use it as a jogger but I don't think it's that great because the front wheel is so small. It might be a little wieldy for a smaller runner.
I've seen the Chariots and I think that's more multipurpose if you also want a stroller. Probably better as a stroller too. Remember that w/ these multiuse ones, you tend to compromise on features. As a result, we have a separate jogger.
I tend to find good used deals on baby stuff from craigslist, especially on sports gear like this. Lots of parents buy w/ high expectations, then realize their kids don't like 'em. Screams "cheap deal" to me. Got Kielty backpack, few years old but only used 2 to 3 times for $25. You can probably find a jogger cheap that way. Bike trailers are tougher to find though.