Indeed, but I think it depends whether you used germline selection or germline modification. IIRC, in germline selection you create many embryos, sequence the genes, and select the embryo with the best genes.

Also, if the cost of sequencing goes down very fast, I would have thought this provides some evidence that the cost of modification would drop at a similar rate. Of course, there is already genetic modification of crops - do you know how that has changed in cost over time?