$250 sounds right. +- 100 depending.
Also, if you know the person, there are some cheap freight where you have to pick it up from a train station or freight location... and they have to drop it off also (ie, not door to door).
Don't do it for a machine you plan to mame. It probably wont be worth it.... just for the shipping. You will find the shipping will cost about as much as what it will take to buy/build a full cabinet (not including monitor / computer).