Curt Class I trailer hitch model # 11352, fits 2010 (and maybe other years) Nissan Altima and Maxima Sedans. It's new in box, with instructions. According to various websites, installation time is about 1 hour.

Trailer Hitch Size: 1-1/4 Inch Hitch Opening
Towing Capacity: 200 Pound Tongue Weight, 2000 Pound Towing

MSRP is $278, you can find it online for about $155, asking $125.