We rent out what used to be our primary residence. We lived there more than two years then moved due to my husband's military service. Because of that service, we qualify for an exemption that essentially makes the "must have lived ther 2 of the lat 5 years" into "2 of the last 15". We are on about year 12.
If we sold today, the profit (well, the amount more then we paid), would be ~~$70k. Not awesome numbers, but at one point we were down about $150k, so overall we are happy. The rental makes okay money. Mostly we kept it because we would have been selling for