I am not in the high end of the fountain pen world. The two pens under $100.00 that I have been very happy with are the Lamy Safari and the silver anniversary Levenger True Writer.
Platinum is really good at QC for the price actually. You’d be surprised. If you don’t like c/c you can eyedropper convert it - look it up on youtube for walkthrough. You can store like 5 or 6 mL of ink that way.Platinum Preppy. $2.00 plastic with steel nib fountain pen (like the Pilot Varsity) but it is c/c refillable. Once it gets going it goes good -- smooth with no skips or hard starts. (Though I suspect that at this price there is probably some QC variation.)