If you mean regular parts:
I have not ordered parts from them (just a tractor), but Barlow's told me they can order parts.
Also, Messicks seems to have a good reputation for parts.
I order from my local dealer (well, I don't order per se, he just has what I need in stock most of the time).
It seems most of the parts are roughly the same price, at least that has been my experience. Others may have different experiences.
I hope that helps or was what you were looking for.