???? Yes.. I haven't saw that!!!!. They have different frequencies for TX and Rx. [:-]
How this Crystals will work with anykind of r/c car or tank if they have different frequencies? Maybe this is just the picture because I can't imagine how crystals with different frequencies would work together. Since they are selling a set of RX and TX 27.255MHz, both crystals should work at 27.255MHz, right?

They also said that it is a "Futaba FM Crystal " set. Does futaba controls works on different frequencies?