The first one is an LSD kit (Limited-Slip Differential), helical gear format for rear differential. The price is 111,510 yen (roughly around $1007.47 as of current currency conversion). It specifically requires differential oil, "Suzuki 4-wheel super gear oil 80W-90 GL-5".
The second one is just a door reflector for 1,998 yen (roughly around $18.05), comes in a set of two, left and right and only for front doors.