A dry and safe place is the way to store it, not the street. And you will be doing work on it. Count on it. A garage is highly advised if you have any classic, let alone a Dino. Any Fiat in the street from that era turns into a brown crunchy pile of rust. Any moisture is bad. Storing it under a cover can make it worse as moisture is trapped and the car can get damp.
So your searching may have to be for a garage first, then buy the Dino.
But take your time and view some Dinos while you search for a place to store it.
The one you found looks like it is worth to have a look at:
-it may have had a respray judging by the non original black coloured engine side vents
-luckily it was not sprayed in 'resale red'
-no fake ferrari badges or any other non original stuff
-interior looks nice and original
-original steering wheel, original fiat horn push button on it
- wheels look nice with original hubcaps.
Unfortunately no engine pictures or underside pictures.
-look for any rust in sills and behind the front wheels. And along rear edges of fenders and rear wheel wells.
-look for original dinoplex ingition box next to the engine
-check if eninge looks normal, not too clean, just normally used, not too much oil weepimg, although it probably is not dry.
- have a compression test done
- check all fluids, check for oil in water and vice versa, check for too much blue smoke on start up ( worn valve guides) etc etc
-the engine hood in the pictures looks like it has not been closed. Check if it closes properly with good shut lines, no gaps like in the picture.
-check receipts for work done. No receipt for parts = assume work was not done. A detailed file means a careful owner and is a plus.
-drive it, see if owners cares to warm it up before revving it. Check regular things like synchros on gears, rough running, rattling noises, misfires, etc etc. Remember these are not quiet cars. You will here valves tapping, the engine whining, and a symphony of sounds when you pull hard and rev it.
- check for fresh underspray: do not trust it. Etc etc. All the normal advice.
- wipers look a bit out of place. Owners can do this to prevent them clapping together and hitting each other. Probably just adjustment needed.
-...
View and drive more before buying. Go home after viewing. View two times. You will see much more things the second time. On the second view your brain can focus on details, rather than all the input it has to process on the first visit like the owner, the surroundings, the first impressions, your emotions,etc.
But please please do not keep it on the street.

Do not buy without a garage. Buy a cheaper daily driver classic if you want to do that, like a late eighties or early nineties alfa spider or another alfa. Plenty of them around. Fun to drive on a budget, with great parts supply. Or get a lancia thema 8.32 or something if you want to go exotic. But not a dino on the street...
YMMV. Buy at own risk. Etc etc.