$350??? ouch, headset and seat clamp are pretty much a given when selling frame only, how did you get to that price?
A given? Yeah, maybe for you. I rode the bike for 10 mins before deciding it's not for me. Frame came from the UK without a headset or seat clamp.
I spent $95+ to get those 2 items. Add more $ to face the headtube for the headset and then installation costs. And once again, both are pretty much new.
The frame also has a rust treatment which no one did for free, so $350 shipped IMO is a fair asking price. Nothing's set in stone.
But thanks for your insight.