I'm not sure what your expectations are for this bike but just so you know... it's going to need a major restoration.
assuming the engine can be resurrected without an overhaul (and that's a big if)
youll still need:
tires tubes & rim strips $200
headlight taillight rear turn signals $100+
battery spark plugs points condenser boots $120
carb kits air filters oil $150
brakes and control cables $150
rear view mirrors chain $100
those are parts prices if you do the work yourself.
double the price if you have to pay for the work
id also add $200 for stuff you don't know about
plus what ever you want to do with the cosmetics.
dont get me wrong it's a great project
folks here on the forum do these all the time.
just wanted to make sure you knew what was entailed
if your still going for it we can help you through things