I found this portable charcoal BBQ grill for only $51.99, originally $130, at Macy's. This is part of Macy's Black Friday in July Sale, which runs through July 23.
The grill has a surface area of 203.5 sq. in. and folds up for easy transport. It also comes with a carrying tote. You'll need to get charcoal and kindling separately.
Make sure to sign up to become a Macy's Star Rewards member so you can get your order shipped with a lower $25 threshold. You usually have to spend $49 or more for free shipping, so signing up saves you money.