Personally, I think a 3rd rounder is steep for a mediocre OA goalie. Not that it is a direct correlation, but if you look at the OA conditions on the Jacob Ingham and Cole Purboo trades, it's only 5th or 6th round picks. Maybe they charged less for the OA condition because they got more in guaranteed picks, but Propp was a worse goalie than both too.
I'd be personally surprised if they gave up more than a 5th or 6th on that condition. That's where it should be anyways. That would be a fair price for a stop gap OA goalie who should hopefully turn it around a little bit and be decent until Malik comes in (which I suspect will probably be around Christmas).