Hello, i came across this bad boy at a thrift store for 12 bucks, from what i have researched its a Polaroid SX-70 Land Camera from mid to late 70's, i believe this is worth much more than the 12 i spent for it, but im not sure how to check if it is functional, its in brilliant condition despite where i found it but im not sure how its core functionality operates. do i need the what-cha-call'ems (photo blanks) to feed though it first? any info woulds be greatly appreciated.