No, unfortunately, as far as I'm aware you must remove the sprocket cover. To do this, first you have to remove the gear lever from the gear shaft - it only involves one (hex) bolt. Removing the cover is simple too, only involves 4 or 5 (allen) bolts, something like that. They are of various lengths so remember where they go.
Also be aware that originally there was a gasket beneath the cover that would likely need replacing - but unless the bike is very low mileage and never had the cover taken off, it's very likely to have been removed before and not replaced as it's basically a redundant part and nobody bothers.
It's a simple, 10 min job to do and there is no harm in asking the seller to do this so you can check it. Shame you have worry in the first place though as it's a cracking bike as all of us here know.