A convenient method for property owners to secure a quick cash infusion, sale-leaseback transactions were plentiful just a couple of years ago, but now it is usually only the more financially burdened of sellers that resort to accepting lowball sale-leaseback offers. Whether White Oak Petroleum L.L.C. falls into the aforementioned category is unclear, but the Springfield, Va.-based company just sold 36 Exxon gasoline station and convenience store properties for $49 million in a sale-leaseback transaction with Jericho, N.Y.-based Getty Realty Corp.