74LS00

$1.49
74LS00 / 74LS00N replacement chip, DIP-14, quadruple 2-Input positive-NAND gate used in arcade games and pinball machine repair.

74LS161

$2.99
SN74LS161 / 74ls161AN replacement chip. DIP 16,  4-Bit Synchronous Binary Counter.

74LS244

$2.49
SN74LS244 replacement chip. DIP-20, Octal Buffers and Line Drivers With 3-State Outputs