Might be some seals that could do with replacing.
The bike is quarter of a century old and it might have been stood for many years with the same oil in it. The engine's internals could be badly corroded and the seals are probably perished. The fuel tank might have internal corrosion, the injection and electrics are still 25 years old and parts will have perished even if the bike has been stored well. Any prospective buyer would be wise to price these extra costs in on top of the purchase price to recommission the bike.
Still a beautiful bike and I wouldn't mind giving it a good home in my garage