This may bring scoffs and laughter but I would, for good value and possible future gains in value, look at what are very inexpensive rifles (Carcanos in two calibers), NorwegianKrags and Swedish
Mausers for superb quality and smooth actions, and the Lee Enfields. Older and often higher quality rifles like some already mentioned can also be found at unbelievably low prices for such high quality. All can be found in original condition for under $200 if you do a lot of searching and parts guns and bubba'd sporters often sell for pocket change to provide a source of replacement parts. Search for and join popular milsurp and collector forums to get info and best of all advice from seasoned collectors. The Mosin Nagants are readily available even in new, unfired condition and they may become more pricey with time....there are just so many, like the SKSs, available. Start with something you like and enjoy and can afford and gradually expand your interests and take some risks (knowledge paid for is invaluable), and you will soon get hooked on your favorites. Good luck!