Looks fairly genuine to me, but a bit oily round the oil pump housing ? Engine a bit dusty but perhaps been sitting 20 years, would depend on how sheltered / breezy the storage was ? Tires would probably be aged and cracked / not long last once back on the road, purely due to age. Odd that breather hose gone but might have been flogged to some other use ? But under pan and heatsheild look to be there. Brakes could be corroded inside ?
Totally over priced !