For new stuff, it is certainly hard to beat a 30/30. The only thing I can think of is those Rossi single shot break open .22 LR rifles that come with 2nd barrels. Most come with shotgun barrels, but some come with .223 also. I'm not sure single shot is what I would want. A 30.30 could lay down several shots quickly if you needed it. 44 Mag leverguns aren't a whole lot more, but you start getting into AK prices at that point.
Also, SKS rifles are still in the $300 range, but most lever guns are a little more compact.