Not all stocks are expensive. These look like bargains and are firing on all cylinders.Real estate investment trusts, or REITs, aren't exactly known for issuing surprising earnings results, but several top-notch REITs have reported stronger-than-expected occupancy, investment activity, and rent growth.Some of the REITs that have pleasantly surprised investors also happen to be trading for relatively cheap valuations, a breath of fresh air at a time when much of the stock market is at or near all-time highs. ...