As a general rule seicentos are not worth a lot, they are 20 years old most of them. That one may have a roof but also probably has an equal sized hole in the floor looking at how it’s parked and how long it’s been there given the green all over it. Buyer beware it’s potentially rotten. Depending on how long you want to hold on to it,
It may become worth something in the future but If there was any money in it, someone would already be restoring it