Keep you can never have enough guns especially when they are cheap, I bought a Mauser argentino in great shape, with matching numbers, and a type 30 Japanese once at the local gun store for $100 together OTD, I liked the Mauser and he threw the Type 30 in just to get rid of it, both are fairly interesting, and I bought them just because I thought that they were interesting and they were cheap.
I also bought my a smooth bore pump shotgun I use for slug hunting, it has rifle sights on it, and I got it for some spare shotgun parts I had laying around, I traded to the store owner for it. It's great gun very accurate and I use if every year. I could have bought with out the trade for $40. Nothing wrong with it just because it's cheap, and while I didn't need another gun, I thought what the heck.
So my vote is keep, you may find a use for it or it may just be good for conversation one day.