Can you purchase the basket/carts for shopping?

Yes

Rent not sure about purchasing them

Motorized carts can be rented. For my family, this is a necessity. Walking the market is a lot of steps. I easily get in 5-7000 everytime I go. Call ahead to reserve a rental or arrive when they open. We go almost every month, so we bought our own. Well worth it.

Cart rentals available Also vendors have carts for sale.

I know you can rent scooters and I am pretty sure they have the carts as well. Right on the front part of the grounds of Hwy 19