That looks like your garden variety 160cc side starter engine, if you have a full list of parts you need/want shoot me a PM I have plenty available, there will be a good piston and std bore available, (depending on your location postage might be a killer) at worst afterwards you might need a set of new std rings, crankcase seals and head and base gaskets. at present I have a good bare one of these engines in my carport.
As for resale price, where I am I am lucky to get $80 for a good second hand mower unless its something special, in the cities prices can go close to double that, hence why I no longer sell used mowers, its more profitable to part them out.
