My single speed thruster cost me $73 after sales tax,
I re-adjusted things, put some better brake pads on the back,
It rides fine.
After a season or two I'll do a Purefix if I got $325 laying around.
Or I'll get another Cheapo Wally bike and wear it out......
OP your putting way too much energy into the simplest of bikes, this energy would be better spent if you just pick a bike and ride.