What should be my next WWII era firearm?

[I.H.1989]

IT seems that fate enjoys toying with me, since not only have I found a Chinese Mauser, I have also found another Arisaka 99 , with a bayonet, but no scabbard.

All of the serial numbers on the bolt, receiver, and it comes with the anti-air sights, but no cleaning rod, and there is no serial number on the bayonet lug. It also appears to be a Series 20 rifle, which would make this a little weirs since that was built in 1941, and I thought that serial numbers were not put on the bayonet lug later in the war.

Anyhow, the asking price is $395, which seems a little high, but I could use a second opinion on this.