Mine is 6x6 and 517/16 -after ww2 to mid 50s production. Yes , you can buy lots of cheap cameras if you are near to big city centers. If not we advise you to buy from APUG for more money but a working camera investment.
Kodak Tourist II camera have a f:12.5 lens , its hard to use at shadow , evening or may be winter.
Zeiss Nettar have f:6.5 lens.