Sure, I have sold a number of domains locked due to 60 days policy. i just use DAN, as they tend to handle this problem themself with the buyer, so i do not need to expain if the buyer prefers to transfer out. Works like a charm.
Most registrars will let you push the domain name (change of account) to another account at their registrar anytime (Even within those 60 days). You just have the buyer create a free account at that registrar and then push it into their account (It doesn't cost anything extra at most registrars to do this).
Godaddy allow to do that that why i keep my domain names with them. But some registrars not allow to do so within 7 days after intial registration and that sucks.