5. Sale of Real Estate

The Company closed on the following sales of real estate, none of which qualified as discontinued operations, during the years ended December 31, 2017, 2016, and 2015.

	For the years ended December 31,
(in thousands, except number of properties)	2017		2016		2015
Number of properties disposed		13		9	6
Aggregate sale price	$	66,532	$	39,500	$	19,455
Aggregate carrying value		50,339		32,665		18,672
Additional sales expenses		3,201		910		1,496
Gain (loss) on sale of real estate		12,992		5,925		(713	)

The Company provided seller financing of $3,700 in connection with one of the 2016 sales (see Note 8).