The Nagant revolver and the Mosin Nagant rifle are probably your best deals.
Makarov and Tokarev pistols are also fairly inexpensive.
You might find good deals on an Enfield.
Pretty sure the Yugoslavian Mauser is the least expensive Model 98.
The French MAS 49 is less than $350. Avoid the cheap conversions though.
One thing to remember is that in collecting, condition is (almost) everything. A collectible Mosin is going to cost more than a rack grade.
Oh, check the CMP for Garands.