In 2013, LEGO released 19 Seasonal sets across 10 subthemes, all of these sets have been retired. Subthemes for that year included Birthday, Chinese New Year, Christmas, Easter, Fall, Halloween, Spring, Summer, Thanksgiving, and Valentines Day. For that year, the total price of all retail sets cost $186, today those sets are valued around $619, a growth of 233%.
Most valuable 2013 LEGO Seasonal set
10250 Year of the Snake $153.55
Highest growth 2013 Seasonal set
850843 LEGO Creator T-Rex Holiday Bauble +901.13%
Most owned 2013 Seasonal set
40083 Christmas Tree Truck
19 sets

10250 Year of the Snake

Theme / Subtheme Seasonal / Chinese New Year
Year 2013
Pieces 243
Availability Retired
10250 LEGO Year of the Snake
Retail $49.99
Value $153.55
Growth  +207.2%
Annual growth 5.5%

40051 Valentine's Day Heart Box

Theme / Subtheme Seasonal / Valentine's Day
Year 2013
Pieces 54
Availability Retired
40051 LEGO Valentine's Day Heart Box
Retail $4.99
Value $19.99
Growth  +300.6%
Annual growth 5.5%

40052 Springtime Scene

Theme / Subtheme Seasonal / Spring
Year 2013
Pieces / Minifigs 88 / 2
Availability Retired
40052 LEGO Springtime Scene
Retail $7.99
Value $12.70
Growth  +58.9%
Annual growth 4.9%

40053 Easter Bunny with Basket

Theme / Subtheme Seasonal / Easter
Year 2013
Pieces 96
Availability Retired
40053 LEGO Easter Bunny with Basket
Retail $4.99
Value $13.70
Growth  +174.5%
Annual growth 8.9%

40054 Summer Scene

Theme / Subtheme Seasonal / Summer
Year 2013
Pieces / Minifigs 40 / 1
Availability Retired
40054 LEGO Summer Scene
Retail $4.99
Value $18.00
Growth  +260.7%
Annual growth 5.2%

40055 Halloween Pumpkin

Theme / Subtheme Seasonal / Halloween
Year 2013
Pieces 52
Availability Retired
40055 LEGO Halloween Pumpkin
Retail $4.99
Value $15.56
Growth  +211.8%
Annual growth 9.0%

40056 Thanksgiving Feast

Theme / Subtheme Seasonal / Thanksgiving
Year 2013
Pieces / Minifigs 46 / 2
Availability Retired
40056 LEGO Thanksgiving Feast
Retail $7.99
Value $21.35
Growth  +167.2%
Annual growth 7.4%

40057 Fall Scene

Theme / Subtheme Seasonal / Fall
Year 2013
Pieces / Minifigs 72 / 3
Availability Retired
40057 LEGO Fall Scene
Retail $7.99
Value $18.10
Growth  +126.5%
Annual growth 3.8%

40058 Decorating the Tree

Theme / Subtheme Seasonal / Christmas
Year 2013
Pieces / Minifigs 110 / 2
Availability Retired
40058 LEGO Christmas Decorating the Tree
Retail $7.99
Value $17.06
Growth  +113.5%
Annual growth 6.3%

40059 Santa's Sleigh

Theme / Subtheme Seasonal / Christmas
Year 2013
Pieces / Minifigs 77 / 2
Availability Retired
40059 LEGO Christmas Santa's Sleigh
Retail $7.99
Value $17.99
Growth  +125.2%
Annual growth 7.2%

40082 Christmas Tree Stand

Theme / Subtheme Seasonal / Christmas
Year 2013
Pieces / Minifigs 115 / 2
Availability Retired
40082 LEGO Christmas Tree Stand
Retail $9.99
Value $49.98
Growth  +400.3%
Annual growth 7.9%

40083 Christmas Tree Truck

Theme / Subtheme Seasonal / Christmas
Year 2013
Pieces / Minifigs 118 / 1
Availability Retired
40083 LEGO Christmas Tree Truck
Retail $9.99
Value $54.47
Growth  +445.2%
Annual growth 6.8%

850791 LEGO Minifigure Birthday Set

Theme / Subtheme Seasonal / Birthday
Year 2013
Pieces / Minifigs 28 / 2
Availability Retired
850791 LEGO Minifigure Birthday Set
Retail $7.99
Value $12.16
Growth  +52.2%
Annual growth 3.7%

850842 LEGO City Fire Truck Holiday Bauble

Theme / Subtheme Seasonal / Christmas
Year 2013
Pieces 34
Availability Retired
850842 Christmas LEGO City Fire Truck Holiday Bauble
Retail $7.99
Value $44.33
Growth  +454.8%
Annual growth 16.0%

850843 LEGO Creator T-Rex Holiday Bauble

Theme / Subtheme Seasonal / Christmas
Year 2013
Pieces 25
Availability Retired
850843 Christmas LEGO Creator T-Rex Holiday Bauble
Retail $7.99
Value $79.99
Growth  +901.1%
Annual growth 12.2%

850849 LEGO Friends Doghouse Holiday Bauble

Theme / Subtheme Seasonal / Christmas
Year 2013
Pieces 29
Availability Retired
850849 Christmas LEGO Friends Doghouse Holiday Bauble
Retail $7.99
Value $24.41
Growth  +205.5%
Annual growth 7.2%

850850 LEGO Santa Holiday Bauble

Theme / Subtheme Seasonal / Christmas
Year 2013
Pieces 23
Availability Retired
850850 Christmas LEGO Santa Holiday Bauble
Retail $7.99
Value $13.53
Growth  +69.3%
Annual growth 3.1%

850851 LEGO Tree Holiday Bauble

Theme / Subtheme Seasonal / Christmas
Year 2013
Pieces 26
Availability Retired
850851 Christmas LEGO Tree Holiday Bauble
Retail $7.99
Value $14.60
Growth  +82.7%
Annual growth 4.1%

850852 LEGO Reindeer Holiday Bauble

Theme / Subtheme Seasonal / Christmas
Year 2013
Pieces 21
Availability Retired
850852 Christmas LEGO Reindeer Holiday Bauble
Retail $7.99
Value $17.86
Growth  +123.5%
Annual growth 4.6%